diff --git a/applications/utilities/mesh/generation/extrudeToRegionMesh/extrudeToRegionMesh.C b/applications/utilities/mesh/generation/extrudeToRegionMesh/extrudeToRegionMesh.C
index a9952b293e..0666eec59b 100644
--- a/applications/utilities/mesh/generation/extrudeToRegionMesh/extrudeToRegionMesh.C
+++ b/applications/utilities/mesh/generation/extrudeToRegionMesh/extrudeToRegionMesh.C
@@ -1209,7 +1209,7 @@ int main(int argc, char *argv[])
         {
             FatalIOErrorIn(args.executable().c_str(), dict)
                 << "Cannot find zone " << zoneNames[zonei]
-                << endl << "Valid zones are " << mesh.faceZones().names()
+                << endl << "Valid zones are " << mesh.faceZones().toc()
                 << exit(FatalIOError);
         }
 
@@ -1222,7 +1222,7 @@ int main(int argc, char *argv[])
             {
                 FatalIOErrorIn(args.executable().c_str(), dict)
                     << "Cannot find opposite zone " << oppositeZoneNames[zonei]
-                    << endl << "Valid zones are " << mesh.faceZones().names()
+                    << endl << "Valid zones are " << mesh.faceZones().toc()
                     << exit(FatalIOError);
             }
         }
diff --git a/applications/utilities/mesh/manipulation/createBaffles/faceSelection/faceZoneSelection.C b/applications/utilities/mesh/manipulation/createBaffles/faceSelection/faceZoneSelection.C
index 1d4450571c..0ffad0fd5a 100644
--- a/applications/utilities/mesh/manipulation/createBaffles/faceSelection/faceZoneSelection.C
+++ b/applications/utilities/mesh/manipulation/createBaffles/faceSelection/faceZoneSelection.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2012-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2012-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -73,7 +73,7 @@ void Foam::faceSelections::faceZoneSelection::select
     {
         FatalErrorInFunction
             << "Cannot find faceZone " << zoneName_ << nl << "Valid zones are "
-            << mesh_.faceZones().names()
+            << mesh_.faceZones().toc()
             << exit(FatalError);
     }
 
diff --git a/applications/utilities/mesh/manipulation/mergeMeshes/mergePolyMesh.C b/applications/utilities/mesh/manipulation/mergeMeshes/mergePolyMesh.C
index 4e6065ab93..45b80bc907 100644
--- a/applications/utilities/mesh/manipulation/mergeMeshes/mergePolyMesh.C
+++ b/applications/utilities/mesh/manipulation/mergeMeshes/mergePolyMesh.C
@@ -142,7 +142,7 @@ Foam::mergePolyMesh::mergePolyMesh(polyMesh& mesh)
     // Insert point, face and cell zones into the list
 
     // Point zones
-    wordList curPointZoneNames = mesh_.pointZones().names();
+    wordList curPointZoneNames = mesh_.pointZones().toc();
     if (curPointZoneNames.size())
     {
         pointZoneNames_.setCapacity(2*curPointZoneNames.size());
@@ -156,7 +156,7 @@ Foam::mergePolyMesh::mergePolyMesh(polyMesh& mesh)
     pointZonesAddedPoints_.setSize(pointZoneNames_.size());
 
     // Face zones
-    wordList curFaceZoneNames = mesh_.faceZones().names();
+    wordList curFaceZoneNames = mesh_.faceZones().toc();
 
     if (curFaceZoneNames.size())
     {
@@ -171,7 +171,7 @@ Foam::mergePolyMesh::mergePolyMesh(polyMesh& mesh)
     faceZonesAddedFaces_.setSize(faceZoneNames_.size());
 
     // Cell zones
-    wordList curCellZoneNames = mesh_.cellZones().names();
+    wordList curCellZoneNames = mesh_.cellZones().toc();
 
     if (curCellZoneNames.size())
     {
diff --git a/applications/utilities/mesh/manipulation/splitMeshRegions/splitMeshRegions.C b/applications/utilities/mesh/manipulation/splitMeshRegions/splitMeshRegions.C
index ec57a96e8d..afdcd89e0a 100644
--- a/applications/utilities/mesh/manipulation/splitMeshRegions/splitMeshRegions.C
+++ b/applications/utilities/mesh/manipulation/splitMeshRegions/splitMeshRegions.C
@@ -1196,7 +1196,7 @@ void matchRegions
     labelList zoneSizes(cellZones.size(), 0);
     {
         List<wordList> zoneNames(Pstream::nProcs());
-        zoneNames[Pstream::myProcNo()] = cellZones.names();
+        zoneNames[Pstream::myProcNo()] = cellZones.toc();
         Pstream::gatherList(zoneNames);
         Pstream::scatterList(zoneNames);
 
diff --git a/applications/utilities/parallelProcessing/redistributePar/loadOrCreateMesh.C b/applications/utilities/parallelProcessing/redistributePar/loadOrCreateMesh.C
index 16206b13ea..a32fed2d92 100644
--- a/applications/utilities/parallelProcessing/redistributePar/loadOrCreateMesh.C
+++ b/applications/utilities/parallelProcessing/redistributePar/loadOrCreateMesh.C
@@ -272,11 +272,11 @@ Foam::autoPtr<Foam::fvMesh> Foam::loadOrCreateMesh
     // Determine zones
     // ~~~~~~~~~~~~~~~
 
-    wordList pointZoneNames(mesh.pointZones().names());
+    wordList pointZoneNames(mesh.pointZones().toc());
     Pstream::scatter(pointZoneNames);
-    wordList faceZoneNames(mesh.faceZones().names());
+    wordList faceZoneNames(mesh.faceZones().toc());
     Pstream::scatter(faceZoneNames);
-    wordList cellZoneNames(mesh.cellZones().names());
+    wordList cellZoneNames(mesh.cellZones().toc());
     Pstream::scatter(cellZoneNames);
 
     if (!haveMesh)
diff --git a/applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightMesh.C b/applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightMesh.C
index e5ec8cf357..53aee8aea2 100644
--- a/applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightMesh.C
+++ b/applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightMesh.C
@@ -261,7 +261,7 @@ void Foam::ensightMesh::correct()
     // faceZones
     if (faceZones_)
     {
-        wordList faceZoneNamesAll = mesh_.faceZones().names();
+        wordList faceZoneNamesAll = mesh_.faceZones().toc();
         // Need to sort the list of all face zones since the index may vary
         // from processor to processor...
         sort(faceZoneNamesAll);
diff --git a/applications/utilities/surface/surfaceMeshTriangulate/surfaceMeshTriangulate.C b/applications/utilities/surface/surfaceMeshTriangulate/surfaceMeshTriangulate.C
index 8a8266126b..8c5e072d0c 100644
--- a/applications/utilities/surface/surfaceMeshTriangulate/surfaceMeshTriangulate.C
+++ b/applications/utilities/surface/surfaceMeshTriangulate/surfaceMeshTriangulate.C
@@ -148,7 +148,7 @@ int main(int argc, char *argv[])
     if (args.optionFound("faceZones"))
     {
         wordReList zoneNames(args.optionLookup("faceZones")());
-        const wordList allZoneNames(mfz.names());
+        const wordList allZoneNames(mfz.toc());
         forAll(zoneNames, i)
         {
             const wordRe& zoneName = zoneNames[i];
diff --git a/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.C b/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.C
index 243f9a2a0f..fe5f06764e 100644
--- a/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.C
+++ b/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2015-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2015-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -69,9 +69,56 @@ Foam::PtrListDictionary<T>::PtrListDictionary(Istream& is)
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
 template<class T>
-inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
+Foam::label Foam::PtrListDictionary<T>::findIndex(const word& key) const
+{
+    forAll(*this, i)
+    {
+        if (operator[](i).keyword() == key)
+        {
+            return i;
+        }
+    }
+
+    return -1;
+}
+
+
+template<class T>
+Foam::List<Foam::label> Foam::PtrListDictionary<T>::findIndices
+(
+    const wordRe& key
+) const
+{
+    List<label> indices;
+
+    if (!key.empty())
+    {
+        if (key.isPattern())
+        {
+            indices = findStrings(key, this->toc());
+        }
+        else
+        {
+            indices.setSize(this->size());
+            label nFound = 0;
+            forAll(*this, i)
+            {
+                if (key == operator[](i).keyword())
+                {
+                    indices[nFound++] = i;
+                }
+            }
+            indices.setSize(nFound);
+        }
+    }
+
+    return indices;
+}
+
+
+template<class T>
+inline void Foam::PtrListDictionary<T>::append
 (
-    const label i,
     const word& key,
     T* ptr
 )
@@ -82,7 +129,50 @@ inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
             << "Cannot insert with key '" << key << "' into hash-table"
             << abort(FatalError);
     }
-    return PtrList<T>::set(i, ptr);
+    return PtrList<T>::append(ptr);
+}
+
+
+template<class T>
+inline void Foam::PtrListDictionary<T>::append
+(
+    const word& key,
+    const autoPtr<T>& aptr
+)
+{
+    return append(key, const_cast<autoPtr<T>&>(aptr).ptr());
+}
+
+
+template<class T>
+inline void Foam::PtrListDictionary<T>::append
+(
+    const word& key,
+    const tmp<T>& t
+)
+{
+    return append(key, const_cast<tmp<T>&>(t).ptr());
+}
+
+
+template<class T>
+inline void Foam::PtrListDictionary<T>::append(T* ptr)
+{
+    append(ptr->keyword(), ptr);
+}
+
+
+template<class T>
+inline void Foam::PtrListDictionary<T>::append(const autoPtr<T>& aptr)
+{
+    append(aptr->keyword(), aptr);
+}
+
+
+template<class T>
+inline void Foam::PtrListDictionary<T>::append(const tmp<T>& t)
+{
+    append(t->keyword(), t);
 }
 
 
@@ -91,14 +181,13 @@ inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
 (
     const label i,
     const word& key,
-    autoPtr<T>& aptr
+    T* ptr
 )
 {
-    T* ptr = aptr.ptr();
-    if (!DictionaryBase<PtrList<T>, T>::hashedTs_.insert(key, ptr))
+    if (!DictionaryBase<PtrList<T>, T>::hashedTs_.set(key, ptr))
     {
         FatalErrorInFunction
-            << "Cannot insert with key '" << key << "' into hash-table"
+            << "Cannot set with key '" << key << "' into hash-table"
             << abort(FatalError);
     }
     return PtrList<T>::set(i, ptr);
@@ -110,17 +199,55 @@ inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
 (
     const label i,
     const word& key,
-    tmp<T>& t
+    const autoPtr<T>& aptr
 )
 {
-    T* ptr = t.ptr();
-    if (!DictionaryBase<PtrList<T>, T>::hashedTs_.insert(key, ptr))
-    {
-        FatalErrorInFunction
-            << "Cannot insert with key '" << key << "' into hash-table"
-            << abort(FatalError);
-    }
-    return PtrList<T>::set(i, ptr);
+    return set(i, key, const_cast<autoPtr<T>&>(aptr).ptr());
+}
+
+
+template<class T>
+inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
+(
+    const label i,
+    const word& key,
+    const tmp<T>& t
+)
+{
+    return set(i, key, const_cast<tmp<T>&>(t).ptr());
+}
+
+
+template<class T>
+inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
+(
+    const label i,
+    T* ptr
+)
+{
+    return set(i, ptr->keyword(), ptr);
+}
+
+
+template<class T>
+inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
+(
+    const label i,
+    const autoPtr<T>& aptr
+)
+{
+    return set(i, aptr->keyword(), aptr);
+}
+
+
+template<class T>
+inline Foam::autoPtr<T> Foam::PtrListDictionary<T>::set
+(
+    const label i,
+    const tmp<T>& t
+)
+{
+    return set(i, t->keyword(), t);
 }
 
 
diff --git a/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.H b/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.H
index 47cb3caf99..8e11f2097c 100644
--- a/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.H
+++ b/src/OpenFOAM/containers/Dictionaries/PtrListDictionary/PtrListDictionary.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2015-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2015-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -40,6 +40,7 @@ SourceFiles
 
 #include "DictionaryBase.H"
 #include "PtrList.H"
+#include "wordRe.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -88,14 +89,59 @@ public:
 
     // Member Functions
 
-        //- Set element to pointer provided and return old element
-        autoPtr<T> set(const label, const word& key, T*);
+        // Access
 
-        //- Set element to autoPtr value provided and return old element
-        autoPtr<T> set(const label, const word& key, autoPtr<T>&);
+            //- Return the index of the given the key or -1 if not found
+            label findIndex(const word& key) const;
 
-        //- Set element to tmp value provided and return old element
-        autoPtr<T> set(const label, const word& key, tmp<T>&);
+            //- Return the indices for all matches
+            //  of the given key regular expression
+            List<label> findIndices(const wordRe& key) const;
+
+
+        // Edit
+
+            //- Append an element at the end of the list
+            inline void append(const word& key, T*);
+
+            //- Append an element at the end of the list
+            inline void append(const word& key, const autoPtr<T>&);
+
+            //- Append an element at the end of the list
+            inline void append(const word& key, const tmp<T>&);
+
+            //- Append an element at the end of the list
+            //  using the element's keyword as the key
+            inline void append(T*);
+
+            //- Append an element at the end of the list
+            //  using the element's keyword as the key
+            inline void append(const autoPtr<T>&);
+
+            //- Append an element at the end of the list
+            //  using the element's keyword as the key
+            inline void append(const tmp<T>&);
+
+            //- Set element to pointer provided and return old element
+            autoPtr<T> set(const label, const word& key, T*);
+
+            //- Set element to autoPtr value provided and return old element
+            autoPtr<T> set(const label, const word& key, const autoPtr<T>&);
+
+            //- Set element to tmp value provided and return old element
+            autoPtr<T> set(const label, const word& key, const tmp<T>&);
+
+            //- Set element to pointer provided and return old element
+            //  using the element's keyword as the key
+            autoPtr<T> set(const label, T*);
+
+            //- Set element to autoPtr value provided and return old element
+            //  using the element's keyword as the key
+            autoPtr<T> set(const label, const autoPtr<T>&);
+
+            //- Set element to tmp value provided and return old element
+            //  using the element's keyword as the key
+            autoPtr<T> set(const label, const tmp<T>&);
 
 
         // Conversion
diff --git a/src/OpenFOAM/db/functionObjects/logFiles/logFiles.C b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.C
index 4362ca61f7..20a5baaa89 100644
--- a/src/OpenFOAM/db/functionObjects/logFiles/logFiles.C
+++ b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2012-2022 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2012-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -98,6 +98,12 @@ Foam::functionObjects::logFiles::~logFiles()
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
+const Foam::wordList& Foam::functionObjects::logFiles::toc() const
+{
+    return names_;
+}
+
+
 const Foam::wordList& Foam::functionObjects::logFiles::names() const
 {
     return names_;
diff --git a/src/OpenFOAM/db/functionObjects/logFiles/logFiles.H b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.H
index 15b749a975..717877bcec 100644
--- a/src/OpenFOAM/db/functionObjects/logFiles/logFiles.H
+++ b/src/OpenFOAM/db/functionObjects/logFiles/logFiles.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2012-2020 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2012-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -107,7 +107,10 @@ public:
 
     // Member Functions
 
-        //- Return const access to the names
+        //- Return the list of log file names
+        const wordList& toc() const;
+
+        //- Return the list of log file names
         const wordList& names() const;
 
         //- Return access to the files
diff --git a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C
index 0dd68e8b03..e6934f5c71 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C
+++ b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -567,7 +567,7 @@ void Foam::polyBoundaryMesh::setGroup
 }
 
 
-Foam::wordList Foam::polyBoundaryMesh::names() const
+Foam::wordList Foam::polyBoundaryMesh::toc() const
 {
     const polyPatchList& patches = *this;
 
@@ -582,6 +582,12 @@ Foam::wordList Foam::polyBoundaryMesh::names() const
 }
 
 
+Foam::wordList Foam::polyBoundaryMesh::names() const
+{
+    return toc();
+}
+
+
 Foam::wordList Foam::polyBoundaryMesh::types() const
 {
     const polyPatchList& patches = *this;
diff --git a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H
index 4bfef1c505..efbe83fa53 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H
+++ b/src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.H
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -153,7 +153,10 @@ public:
         //  Only valid for singly connected polyBoundaryMesh and not parallel
         const List<labelPairList>& nbrEdges() const;
 
-        //- Return a list of patch names
+        //- Return the list of patch names
+        wordList toc() const;
+
+        //- Return the list of patch names
         wordList names() const;
 
         //- Return a list of patch types
diff --git a/src/OpenFOAM/meshes/polyMesh/polyMesh.C b/src/OpenFOAM/meshes/polyMesh/polyMesh.C
index 55156444f3..4cfc9651a2 100644
--- a/src/OpenFOAM/meshes/polyMesh/polyMesh.C
+++ b/src/OpenFOAM/meshes/polyMesh/polyMesh.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -1144,7 +1144,7 @@ void Foam::polyMesh::addZones
         // Copy the zone pointers
         forAll(pz, pI)
         {
-            pointZones_.set(pI, pz[pI]);
+            pointZones_.set(pI, pz[pI]->name(), pz[pI]);
         }
 
         pointZones_.writeOpt() = IOobject::AUTO_WRITE;
@@ -1158,7 +1158,7 @@ void Foam::polyMesh::addZones
         // Copy the zone pointers
         forAll(fz, fI)
         {
-            faceZones_.set(fI, fz[fI]);
+            faceZones_.set(fI, fz[fI]->name(), fz[fI]);
         }
 
         faceZones_.writeOpt() = IOobject::AUTO_WRITE;
@@ -1172,7 +1172,7 @@ void Foam::polyMesh::addZones
         // Copy the zone pointers
         forAll(cz, cI)
         {
-            cellZones_.set(cI, cz[cI]);
+            cellZones_.set(cI, cz[cI]->name(), cz[cI]);
         }
 
         cellZones_.writeOpt() = IOobject::AUTO_WRITE;
diff --git a/src/OpenFOAM/meshes/zones/Zone/Zone.H b/src/OpenFOAM/meshes/zones/Zone/Zone.H
index 8f8a56072d..a2089e4e67 100644
--- a/src/OpenFOAM/meshes/zones/Zone/Zone.H
+++ b/src/OpenFOAM/meshes/zones/Zone/Zone.H
@@ -183,6 +183,12 @@ public:
             return name_;
         }
 
+        //- Return name as the keyword
+        const word& keyword() const
+        {
+            return name_;
+        }
+
         //- Return ZonesType reference
         const ZonesType& zones() const;
 
diff --git a/src/OpenFOAM/meshes/zones/Zones/Zones.C b/src/OpenFOAM/meshes/zones/Zones/Zones.C
index 25593b9500..f69dd6e5ce 100644
--- a/src/OpenFOAM/meshes/zones/Zones/Zones.C
+++ b/src/OpenFOAM/meshes/zones/Zones/Zones.C
@@ -47,7 +47,7 @@ bool Foam::Zones<ZoneType, ZonesType, MeshType>::read()
                 << endl;
         }
 
-        PtrList<ZoneType>& zones = *this;
+        PtrListDictionary<ZoneType>& zones = *this;
 
         // Read zones
         Istream& is = readStream(typeName);
@@ -60,6 +60,7 @@ bool Foam::Zones<ZoneType, ZonesType, MeshType>::read()
             zones.set
             (
                 zi,
+                patchEntries[zi].keyword(),
                 ZoneType::New
                 (
                     patchEntries[zi].keyword(),
@@ -97,8 +98,8 @@ Foam::Zones<ZoneType, ZonesType, MeshType>::Zones
     const MeshType& mesh
 )
 :
-    PtrList<ZoneType>(),
     regIOobject(io),
+    PtrListDictionary<ZoneType>(0),
     mesh_(mesh)
 {
     read();
@@ -113,8 +114,8 @@ Foam::Zones<ZoneType, ZonesType, MeshType>::Zones
     const label size
 )
 :
-    PtrList<ZoneType>(size),
     regIOobject(io),
+    PtrListDictionary<ZoneType>(size),
     mesh_(mesh)
 {
     // Optionally read contents, otherwise keep size
@@ -130,21 +131,26 @@ Foam::Zones<ZoneType, ZonesType, MeshType>::Zones
     const PtrList<ZoneType>& mpz
 )
 :
-    PtrList<ZoneType>(),
     regIOobject(io),
+    PtrListDictionary<ZoneType>(0),
     mesh_(mesh)
 {
     if (!read())
     {
         // Nothing read. Use supplied zones
-        PtrList<ZoneType>& zones = *this;
+        PtrListDictionary<ZoneType>& zones = *this;
         zones.setSize(mpz.size());
         forAll(zones, zi)
         {
-            zones.set(zi, mpz[zi].clone
+            zones.set
             (
-                static_cast<const ZonesType&>(*this)
-            ).ptr());
+                zi,
+                mpz[zi].name(),
+                mpz[zi].clone
+                (
+                    static_cast<const ZonesType&>(*this)
+                )
+            );
         }
     }
 }
@@ -202,7 +208,7 @@ Foam::labelList Foam::Zones<ZoneType, ZonesType, MeshType>::whichZones
 template<class ZoneType, class ZonesType, class MeshType>
 Foam::wordList Foam::Zones<ZoneType, ZonesType, MeshType>::types() const
 {
-    const PtrList<ZoneType>& zones = *this;
+    const PtrListDictionary<ZoneType>& zones = *this;
 
     wordList lst(zones.size());
 
@@ -215,124 +221,6 @@ Foam::wordList Foam::Zones<ZoneType, ZonesType, MeshType>::types() const
 }
 
 
-template<class ZoneType, class ZonesType, class MeshType>
-Foam::wordList Foam::Zones<ZoneType, ZonesType, MeshType>::names() const
-{
-    const PtrList<ZoneType>& zones = *this;
-
-    wordList lst(zones.size());
-
-    forAll(zones, zi)
-    {
-        lst[zi] = zones[zi].name();
-    }
-
-    return lst;
-}
-
-
-template<class ZoneType, class ZonesType, class MeshType>
-bool Foam::Zones<ZoneType, ZonesType, MeshType>::found
-(
-    const word& zoneName
-) const
-{
-    if (zoneName != word::null)
-    {
-        forAll(*this, i)
-        {
-            if (zoneName == operator[](i).name())
-            {
-                return true;
-            }
-        }
-    }
-
-    // Not found
-    return false;
-}
-
-
-template<class ZoneType, class ZonesType, class MeshType>
-Foam::label Foam::Zones<ZoneType, ZonesType, MeshType>::findIndex
-(
-    const word& zoneName
-) const
-{
-    const PtrList<ZoneType>& zones = *this;
-
-    forAll(zones, zi)
-    {
-        if (zones[zi].name() == zoneName)
-        {
-            return zi;
-        }
-    }
-
-    // Zone not found
-    if (debug)
-    {
-        InfoInFunction
-            << "Zone named " << zoneName << " not found.  "
-            << "List of available zone names: " << names() << endl;
-    }
-
-    // not found
-    return -1;
-}
-
-
-template<class ZoneType, class ZonesType, class MeshType>
-Foam::labelList Foam::Zones<ZoneType, ZonesType, MeshType>::findIndices
-(
-    const wordRe& key
-) const
-{
-    labelList indices;
-
-    if (!key.empty())
-    {
-        if (key.isPattern())
-        {
-            indices = findStrings(key, this->names());
-        }
-        else
-        {
-            indices.setSize(this->size());
-            label nFound = 0;
-            forAll(*this, i)
-            {
-                if (key == operator[](i).name())
-                {
-                    indices[nFound++] = i;
-                }
-            }
-            indices.setSize(nFound);
-        }
-    }
-
-    return indices;
-}
-
-
-template<class ZoneType, class ZonesType, class MeshType>
-Foam::PackedBoolList Foam::Zones<ZoneType, ZonesType, MeshType>::findMatching
-(
-    const wordRe& key
-) const
-{
-    PackedBoolList lst;
-
-    const labelList indices = this->findIndices(key);
-    forAll(indices, i)
-    {
-        lst |= static_cast<const labelList&>(this->operator[](indices[i]));
-    }
-
-    return lst;
-}
-
-
 template<class ZoneType, class ZonesType, class MeshType>
 void Foam::Zones<ZoneType, ZonesType, MeshType>::append(ZoneType* zonePtr) const
 {
@@ -346,7 +234,11 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::append(ZoneType* zonePtr) const
     }
     else
     {
-        zones.PtrList<ZoneType>::append(zonePtr);
+        zones.PtrListDictionary<ZoneType>::append
+        (
+            zonePtr->name(),
+            zonePtr
+        );
     }
 }
 
@@ -366,7 +258,11 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::append
     }
     else
     {
-        zones.PtrList<ZoneType>::append(zone.clone(*this));
+        zones.PtrListDictionary<ZoneType>::append
+        (
+            zone.name(),
+            zone.clone(*this)
+        );
     }
 }
 
@@ -374,7 +270,7 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::append
 template<class ZoneType, class ZonesType, class MeshType>
 void Foam::Zones<ZoneType, ZonesType, MeshType>::clearAddressing()
 {
-    PtrList<ZoneType>& zones = *this;
+    PtrListDictionary<ZoneType>& zones = *this;
 
     forAll(zones, zi)
     {
@@ -387,7 +283,7 @@ template<class ZoneType, class ZonesType, class MeshType>
 void Foam::Zones<ZoneType, ZonesType, MeshType>::clear()
 {
     clearAddressing();
-    PtrList<ZoneType>::clear();
+    PtrListDictionary<ZoneType>::clear();
 }
 
 
@@ -399,7 +295,7 @@ bool Foam::Zones<ZoneType, ZonesType, MeshType>::checkDefinition
 {
     bool inError = false;
 
-    const PtrList<ZoneType>& zones = *this;
+    const PtrListDictionary<ZoneType>& zones = *this;
 
     forAll(zones, zi)
     {
@@ -421,13 +317,13 @@ bool Foam::Zones<ZoneType, ZonesType, MeshType>::checkParallelSync
     }
 
 
-    const PtrList<ZoneType>& zones = *this;
+    const PtrListDictionary<ZoneType>& zones = *this;
 
     bool hasError = false;
 
     // Collect all names
     List<wordList> allNames(Pstream::nProcs());
-    allNames[Pstream::myProcNo()] = this->names();
+    allNames[Pstream::myProcNo()] = this->toc();
     Pstream::gatherList(allNames);
     Pstream::scatterList(allNames);
 
@@ -493,7 +389,7 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::insert
     const List<labelHashSet>& zonesIndices
 )
 {
-    PtrList<ZoneType>& zones = *this;
+    PtrListDictionary<ZoneType>& zones = *this;
 
     if (zonesIndices.size() != zones.size())
     {
@@ -513,7 +409,7 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::insert
 template<class ZoneType, class ZonesType, class MeshType>
 void Foam::Zones<ZoneType, ZonesType, MeshType>::movePoints(const pointField& p)
 {
-    PtrList<ZoneType>& zones = *this;
+    PtrListDictionary<ZoneType>& zones = *this;
 
     forAll(zones, zi)
     {
@@ -528,7 +424,7 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::topoChange
     const polyTopoChangeMap& map
 )
 {
-    PtrList<ZoneType>& zones = *this;
+    PtrListDictionary<ZoneType>& zones = *this;
 
     forAll(zones, zi)
     {
@@ -540,7 +436,7 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::topoChange
 template<class ZoneType, class ZonesType, class MeshType>
 void Foam::Zones<ZoneType, ZonesType, MeshType>::mapMesh(const polyMeshMap& map)
 {
-    PtrList<ZoneType>& zones = *this;
+    PtrListDictionary<ZoneType>& zones = *this;
 
     forAll(zones, zi)
     {
@@ -555,7 +451,7 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::distribute
     const polyDistributionMap& map
 )
 {
-    PtrList<ZoneType>& zones = *this;
+    PtrListDictionary<ZoneType>& zones = *this;
 
     forAll(zones, zi)
     {
@@ -570,7 +466,7 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::swap(ZonesType& otherZones)
     clearAddressing();
     otherZones.clearAddressing();
 
-    PtrList<ZoneType>& zones = *this;
+    PtrListDictionary<ZoneType>& zones = *this;
 
     DynamicList<label> toOtherZone;
 
@@ -586,15 +482,19 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::swap(ZonesType& otherZones)
 
     forAll(otherZones, ozi)
     {
-        const label zi = findIndex(otherZones[ozi].name());
+        const label zi = this->findIndex(otherZones[ozi].name());
 
         if (zi < 0)
         {
-            zones.append(otherZones[ozi].clone
+            zones.append
             (
-                static_cast<const ZonesType&>(*this))
+                otherZones[ozi].name(),
+                otherZones[ozi].clone
+                (
+                    static_cast<const ZonesType&>(*this)
+                )
             );
-            otherZones.set(ozi, nullptr);
+            otherZones.set(ozi, otherZones[ozi].name(), nullptr);
         }
         else
         {
@@ -604,11 +504,12 @@ void Foam::Zones<ZoneType, ZonesType, MeshType>::swap(ZonesType& otherZones)
 
     forAll(toOtherZone, i)
     {
-        otherZones.PtrList<ZoneType>::append
+        otherZones.PtrListDictionary<ZoneType>::append
         (
+            zones[toOtherZone[i]].name(),
             zones[toOtherZone[i]].clone(otherZones)
         );
-        zones.set(toOtherZone[i], nullptr);
+        zones.set(toOtherZone[i], zones[toOtherZone[i]].name(), nullptr);
     }
 
     zones.shrink();
@@ -624,48 +525,6 @@ bool Foam::Zones<ZoneType, ZonesType, MeshType>::writeData(Ostream& os) const
 }
 
 
-// * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * * //
-
-template<class ZoneType, class ZonesType, class MeshType>
-const ZoneType& Foam::Zones<ZoneType, ZonesType, MeshType>::operator[]
-(
-    const word& zoneName
-) const
-{
-    const label zi = findIndex(zoneName);
-
-    if (zi < 0)
-    {
-        FatalErrorInFunction
-            << "Zone named " << zoneName << " not found." << nl
-            << "Available zone names: " << names() << endl
-            << abort(FatalError);
-    }
-
-    return operator[](zi);
-}
-
-
-template<class ZoneType, class ZonesType, class MeshType>
-ZoneType& Foam::Zones<ZoneType, ZonesType, MeshType>::operator[]
-(
-    const word& zoneName
-)
-{
-    const label zi = findIndex(zoneName);
-
-    if (zi < 0)
-    {
-        FatalErrorInFunction
-            << "Zone named " << zoneName << " not found." << nl
-            << "Available zone names: " << names() << endl
-            << abort(FatalError);
-    }
-
-    return operator[](zi);
-}
-
-
 // * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //
 
 template<class ZoneType, class ZonesType, class MeshType>
diff --git a/src/OpenFOAM/meshes/zones/Zones/Zones.H b/src/OpenFOAM/meshes/zones/Zones/Zones.H
index b284a4a4a9..8e42239f82 100644
--- a/src/OpenFOAM/meshes/zones/Zones/Zones.H
+++ b/src/OpenFOAM/meshes/zones/Zones/Zones.H
@@ -35,6 +35,7 @@ SourceFiles
 #ifndef Zones_H
 #define Zones_H
 
+#include "PtrListDictionary.H"
 #include "regIOobject.H"
 #include "pointFieldFwd.H"
 #include "Map.H"
@@ -66,8 +67,8 @@ Ostream& operator<<(Ostream&, const Zones<ZoneType, ZonesType, MeshType>&);
 template<class ZoneType, class ZonesType, class MeshType>
 class Zones
 :
-    public PtrList<ZoneType>,
-    public regIOobject
+    public regIOobject,
+    public PtrListDictionary<ZoneType>
 {
     // Private Data
 
@@ -127,6 +128,8 @@ public:
             return mesh_;
         }
 
+        using PtrListDictionary<ZoneType>::found;
+
         //- Return true if objectIndex is in any zone
         bool found(const label objectIndex) const;
 
@@ -136,21 +139,6 @@ public:
         //- Return a list of zone types
         wordList types() const;
 
-        //- Return a list of zone names
-        wordList names() const;
-
-        //- Return true if the given zoneName is present
-        bool found(const word& zoneName) const;
-
-        //- Find the zone index given the zone name
-        label findIndex(const word& zoneName) const;
-
-        //- Find and return the zone indices for all matches
-        labelList findIndices(const wordRe&) const;
-
-        //- Mark cells that match the zone specification
-        PackedBoolList findMatching(const wordRe&) const;
-
         //- Append or update a zone
         void append(ZoneType*) const;
 
@@ -196,13 +184,7 @@ public:
     // Member Operators
 
         //- Return const and non-const reference to ZoneType by index.
-        using PtrList<ZoneType>::operator[];
-
-        //- Return const reference to ZoneType by name.
-        const ZoneType& operator[](const word&) const;
-
-        //- Return reference to ZoneType by name.
-        ZoneType& operator[](const word&);
+        using PtrListDictionary<ZoneType>::operator[];
 
         //- Disallow default bitwise assignment
         void operator=(const Zones<ZoneType, ZonesType, MeshType>&) = delete;
diff --git a/src/conversion/meshReader/meshReader.C b/src/conversion/meshReader/meshReader.C
index fb014812b4..fef5544f37 100644
--- a/src/conversion/meshReader/meshReader.C
+++ b/src/conversion/meshReader/meshReader.C
@@ -70,7 +70,7 @@ lookup
 void Foam::meshReader::addCellZones(polyMesh& mesh) const
 {
     cellTable_.addCellZones(mesh, cellTableId_);
-    warnDuplicates("cellZones", mesh.cellZones().names());
+    warnDuplicates("cellZones", mesh.cellZones().toc());
 }
 
 
@@ -112,7 +112,7 @@ void Foam::meshReader::addFaceZones(polyMesh& mesh) const
         nZone++;
     }
     mesh.faceZones().writeOpt() = IOobject::AUTO_WRITE;
-    warnDuplicates("faceZones", mesh.faceZones().names());
+    warnDuplicates("faceZones", mesh.faceZones().toc());
 }
 
 
diff --git a/src/conversion/meshTables/cellTable.C b/src/conversion/meshTables/cellTable.C
index acd3bad542..98fc2aae83 100644
--- a/src/conversion/meshTables/cellTable.C
+++ b/src/conversion/meshTables/cellTable.C
@@ -399,7 +399,7 @@ void Foam::cellTable::operator=(const polyMesh& mesh)
     // create cellTableId and cellTable based on cellZones
     label nZoneCells = 0;
 
-    wordList zoneNames = mesh.cellZones().names();
+    wordList zoneNames = mesh.cellZones().toc();
     label unZonedType = zoneNames.size() + 1;
 
     // do cell zones
diff --git a/src/finiteVolume/fvMesh/singleCellFvMesh/singleCellFvMesh.C b/src/finiteVolume/fvMesh/singleCellFvMesh/singleCellFvMesh.C
index 215cc4bb01..00b4066033 100644
--- a/src/finiteVolume/fvMesh/singleCellFvMesh/singleCellFvMesh.C
+++ b/src/finiteVolume/fvMesh/singleCellFvMesh/singleCellFvMesh.C
@@ -292,14 +292,14 @@ void Foam::singleCellFvMesh::agglomerateMesh
     {
         forAll(mesh.cellZones(), zoneI)
         {
-            const cellZone& oldFz = mesh.cellZones()[zoneI];
+            const cellZone& oldCz = mesh.cellZones()[zoneI];
 
             DynamicList<label> newAddressing;
 
             cellZones().set
             (
                 zoneI,
-                oldFz.clone
+                oldCz.clone
                 (
                     newAddressing,
                     cellZones()
@@ -348,13 +348,13 @@ void Foam::singleCellFvMesh::agglomerateMesh
     {
         forAll(mesh.pointZones(), zoneI)
         {
-            const pointZone& oldFz = mesh.pointZones()[zoneI];
+            const pointZone& oldPz = mesh.pointZones()[zoneI];
 
-            DynamicList<label> newAddressing(oldFz.size());
+            DynamicList<label> newAddressing(oldPz.size());
 
-            forAll(oldFz, i)
+            forAll(oldPz, i)
             {
-                label newPointi  = reversePointMap_[oldFz[i]];
+                label newPointi  = reversePointMap_[oldPz[i]];
                 if (newPointi != -1)
                 {
                     newAddressing.append(newPointi);
@@ -364,7 +364,7 @@ void Foam::singleCellFvMesh::agglomerateMesh
             pointZones().set
             (
                 zoneI,
-                oldFz.clone
+                oldPz.clone
                 (
                     newAddressing,
                     pointZones()
diff --git a/src/functionObjects/field/fieldValues/surfaceFieldValue/surfaceFieldValue.C b/src/functionObjects/field/fieldValues/surfaceFieldValue/surfaceFieldValue.C
index 17a7b89e67..2f220066a2 100644
--- a/src/functionObjects/field/fieldValues/surfaceFieldValue/surfaceFieldValue.C
+++ b/src/functionObjects/field/fieldValues/surfaceFieldValue/surfaceFieldValue.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -112,7 +112,7 @@ void Foam::functionObjects::fieldValues::surfaceFieldValue::setFaceZoneFaces()
             << selectionTypeNames[selectionType_]
             << "(" << selectionName_ << "):" << nl
             << "    Unknown face zone name: " << selectionName_
-            << ". Valid face zones are: " << mesh_.faceZones().names()
+            << ". Valid face zones are: " << mesh_.faceZones().toc()
             << nl << exit(FatalError);
     }
 
diff --git a/src/functionObjects/field/layerAverage/layerAverage.C b/src/functionObjects/field/layerAverage/layerAverage.C
index 335dca3a46..8842cea01a 100644
--- a/src/functionObjects/field/layerAverage/layerAverage.C
+++ b/src/functionObjects/field/layerAverage/layerAverage.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -250,7 +250,7 @@ bool Foam::functionObjects::layerAverage::read(const dictionary& dict)
         findStrings
         (
             dict.lookupOrDefault<wordReList>("zones", wordReList()),
-            mesh_.faceZones().names()
+            mesh_.faceZones().toc()
         );
 
     if (patchIndices_.empty() && zoneIndices_.empty())
diff --git a/src/fvModels/derived/effectivenessHeatExchanger/effectivenessHeatExchanger.C b/src/fvModels/derived/effectivenessHeatExchanger/effectivenessHeatExchanger.C
index 3006434e2f..8d20a69a9a 100644
--- a/src/fvModels/derived/effectivenessHeatExchanger/effectivenessHeatExchanger.C
+++ b/src/fvModels/derived/effectivenessHeatExchanger/effectivenessHeatExchanger.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2013-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2013-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -75,7 +75,7 @@ void Foam::fv::effectivenessHeatExchanger::setZone()
         FatalErrorInFunction
             << type() << " " << this->name() << ": "
             << "    Unknown face zone name: " << faceZoneName_
-            << ". Valid face zones are: " << mesh().faceZones().names()
+            << ". Valid face zones are: " << mesh().faceZones().toc()
             << nl << exit(FatalError);
     }
 
diff --git a/src/lagrangian/parcel/submodels/Momentum/InjectionModel/CellZoneInjection/CellZoneInjection.C b/src/lagrangian/parcel/submodels/Momentum/InjectionModel/CellZoneInjection/CellZoneInjection.C
index 3e0de4495e..6ca49fc26a 100644
--- a/src/lagrangian/parcel/submodels/Momentum/InjectionModel/CellZoneInjection/CellZoneInjection.C
+++ b/src/lagrangian/parcel/submodels/Momentum/InjectionModel/CellZoneInjection/CellZoneInjection.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -223,7 +223,7 @@ void Foam::CellZoneInjection<CloudType>::topoChange()
     {
         FatalErrorInFunction
             << "Unknown cell zone name: " << cellZoneName_
-            << ". Valid cell zones are: " << mesh.cellZones().names()
+            << ". Valid cell zones are: " << mesh.cellZones().toc()
             << nl << exit(FatalError);
     }
 
diff --git a/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C b/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C
index b7a26c46b9..f3645b7949 100644
--- a/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C
+++ b/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.C
@@ -1807,7 +1807,7 @@ void Foam::meshRefinement::checkCoupledFaceZones(const polyMesh& mesh)
 
     {
         List<wordList> zoneNames(Pstream::nProcs());
-        zoneNames[Pstream::myProcNo()] = fZones.names();
+        zoneNames[Pstream::myProcNo()] = fZones.toc();
         Pstream::gatherList(zoneNames);
         Pstream::scatterList(zoneNames);
         // All have same data now. Check.
diff --git a/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C b/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C
index fd5c2e3b32..79449837ca 100644
--- a/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C
+++ b/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C
@@ -374,7 +374,7 @@ Foam::labelList Foam::surfaceZonesInfo::addCellZonesToMesh
 
     // Check they are synced
     List<wordList> allCellZones(Pstream::nProcs());
-    allCellZones[Pstream::myProcNo()] = cellZones.names();
+    allCellZones[Pstream::myProcNo()] = cellZones.toc();
     Pstream::gatherList(allCellZones);
     Pstream::scatterList(allCellZones);
 
@@ -436,7 +436,7 @@ Foam::labelList Foam::surfaceZonesInfo::addFaceZonesToMesh
 
     // Check they are synced
     List<wordList> allFaceZones(Pstream::nProcs());
-    allFaceZones[Pstream::myProcNo()] = faceZones.names();
+    allFaceZones[Pstream::myProcNo()] = faceZones.toc();
     Pstream::gatherList(allFaceZones);
     Pstream::scatterList(allFaceZones);
 
diff --git a/src/meshTools/sets/cellSources/faceZoneToCell/faceZoneToCell.C b/src/meshTools/sets/cellSources/faceZoneToCell/faceZoneToCell.C
index 5edbe2e176..cf3c93cb19 100644
--- a/src/meshTools/sets/cellSources/faceZoneToCell/faceZoneToCell.C
+++ b/src/meshTools/sets/cellSources/faceZoneToCell/faceZoneToCell.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2021 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -91,7 +91,7 @@ void Foam::faceZoneToCell::combine(topoSet& set, const bool add) const
     {
         WarningInFunction
             << "Cannot find any faceZone named " << zoneName_ << endl
-            << "Valid names are " << mesh_.faceZones().names() << endl;
+            << "Valid names are " << mesh_.faceZones().toc() << endl;
     }
 }
 
diff --git a/src/meshTools/sets/cellSources/zoneToCell/zoneToCell.C b/src/meshTools/sets/cellSources/zoneToCell/zoneToCell.C
index 30a26f82c7..314bd8ee79 100644
--- a/src/meshTools/sets/cellSources/zoneToCell/zoneToCell.C
+++ b/src/meshTools/sets/cellSources/zoneToCell/zoneToCell.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2021 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -71,7 +71,7 @@ void Foam::zoneToCell::combine(topoSet& set, const bool add) const
     {
         WarningInFunction
             << "Cannot find any cellZone named " << zoneName_ << endl
-            << "Valid names are " << mesh_.cellZones().names() << endl;
+            << "Valid names are " << mesh_.cellZones().toc() << endl;
     }
 }
 
diff --git a/src/meshTools/sets/faceSources/zoneToFace/zoneToFace.C b/src/meshTools/sets/faceSources/zoneToFace/zoneToFace.C
index d2a0d44909..4a4fd9903f 100644
--- a/src/meshTools/sets/faceSources/zoneToFace/zoneToFace.C
+++ b/src/meshTools/sets/faceSources/zoneToFace/zoneToFace.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2021 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -71,7 +71,7 @@ void Foam::zoneToFace::combine(topoSet& set, const bool add) const
     {
         WarningInFunction
             << "Cannot find any faceZone named " << zoneName_ << endl
-            << "Valid names are " << mesh_.faceZones().names() << endl;
+            << "Valid names are " << mesh_.faceZones().toc() << endl;
     }
 }
 
diff --git a/src/meshTools/sets/pointSources/zoneToPoint/zoneToPoint.C b/src/meshTools/sets/pointSources/zoneToPoint/zoneToPoint.C
index 20c9325e3a..6b3daa01e1 100644
--- a/src/meshTools/sets/pointSources/zoneToPoint/zoneToPoint.C
+++ b/src/meshTools/sets/pointSources/zoneToPoint/zoneToPoint.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2011-2021 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -72,7 +72,7 @@ void Foam::zoneToPoint::combine(topoSet& set, const bool add) const
     {
         WarningInFunction
             << "Cannot find any pointZone named " << zoneName_ << endl
-            << "Valid names are " << mesh_.pointZones().names() << endl;
+            << "Valid names are " << mesh_.pointZones().toc() << endl;
     }
 }
 
diff --git a/src/meshTools/sets/polyCellSet/polyCellSet.C b/src/meshTools/sets/polyCellSet/polyCellSet.C
index a655ee6602..06469b40c3 100644
--- a/src/meshTools/sets/polyCellSet/polyCellSet.C
+++ b/src/meshTools/sets/polyCellSet/polyCellSet.C
@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     | Website:  https://openfoam.org
-    \\  /    A nd           | Copyright (C) 2022-2023 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2022-2024 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -102,7 +102,7 @@ void Foam::polyCellSet::setCells()
             {
                 FatalErrorInFunction
                     << "Cannot find cellZone " << cellSetName_ << endl
-                    << "Valid cellZones are " << mesh_.cellZones().names()
+                    << "Valid cellZones are " << mesh_.cellZones().toc()
                     << exit(FatalError);
             }
 
diff --git a/src/motionSolvers/displacement/layeredSolver/displacementLayeredMotionMotionSolver.C b/src/motionSolvers/displacement/layeredSolver/displacementLayeredMotionMotionSolver.C
index 79dd65c5ed..21264fce85 100644
--- a/src/motionSolvers/displacement/layeredSolver/displacementLayeredMotionMotionSolver.C
+++ b/src/motionSolvers/displacement/layeredSolver/displacementLayeredMotionMotionSolver.C
@@ -309,7 +309,7 @@ void Foam::displacementLayeredMotionMotionSolver::cellZoneSolve
         {
             FatalErrorInFunction
                 << "Cannot find faceZone " << faceZoneName
-                << endl << "Valid zones are " << mesh().faceZones().names()
+                << endl << "Valid zones are " << mesh().faceZones().toc()
                 << exit(FatalError);
         }
 
@@ -543,7 +543,7 @@ void Foam::displacementLayeredMotionMotionSolver::solve()
         {
             FatalErrorInFunction
                 << "Cannot find cellZone " << cellZoneName
-                << endl << "Valid zones are " << mesh().cellZones().names()
+                << endl << "Valid zones are " << mesh().cellZones().toc()
                 << exit(FatalError);
         }
 
diff --git a/src/motionSolvers/displacement/solidBody/multiSolidBodyMotionSolver/multiSolidBodyMotionSolver.C b/src/motionSolvers/displacement/solidBody/multiSolidBodyMotionSolver/multiSolidBodyMotionSolver.C
index a1f440d351..07dbbc7f96 100644
--- a/src/motionSolvers/displacement/solidBody/multiSolidBodyMotionSolver/multiSolidBodyMotionSolver.C
+++ b/src/motionSolvers/displacement/solidBody/multiSolidBodyMotionSolver/multiSolidBodyMotionSolver.C
@@ -72,7 +72,7 @@ Foam::multiSolidBodyMotionSolver::multiSolidBodyMotionSolver
                 (
                     coeffDict()
                 )   << "Cannot find cellZone named " << iter().keyword()
-                    << ". Valid zones are " << mesh.cellZones().names()
+                    << ". Valid zones are " << mesh.cellZones().toc()
                     << exit(FatalIOError);
             }
 
diff --git a/src/parallel/decompose/decompositionMethods/decompositionConstraints/preserveFaceZones/preserveFaceZonesConstraint.C b/src/parallel/decompose/decompositionMethods/decompositionConstraints/preserveFaceZones/preserveFaceZonesConstraint.C
index f1ba4192e8..be9add9cdc 100644
--- a/src/parallel/decompose/decompositionMethods/decompositionConstraints/preserveFaceZones/preserveFaceZonesConstraint.C
+++ b/src/parallel/decompose/decompositionMethods/decompositionConstraints/preserveFaceZones/preserveFaceZonesConstraint.C
@@ -99,7 +99,7 @@ void Foam::decompositionConstraints::preserveFaceZonesConstraint::add
 
     const faceZones& fZones = mesh.faceZones();
 
-    const labelList zoneIDs = findStrings(zones_, fZones.names());
+    const labelList zoneIDs = findStrings(zones_, fZones.toc());
 
     label nUnblocked = 0;
 
@@ -169,7 +169,7 @@ void Foam::decompositionConstraints::preserveFaceZonesConstraint::apply
 
     const faceZones& fZones = mesh.faceZones();
 
-    const labelList zoneIDs = findStrings(zones_, fZones.names());
+    const labelList zoneIDs = findStrings(zones_, fZones.toc());
 
     label nChanged = 0;
 
diff --git a/src/polyTopoChange/fvMeshDistribute/fvMeshDistribute.C b/src/polyTopoChange/fvMeshDistribute/fvMeshDistribute.C
index 2298babc38..5dab078cda 100644
--- a/src/polyTopoChange/fvMeshDistribute/fvMeshDistribute.C
+++ b/src/polyTopoChange/fvMeshDistribute/fvMeshDistribute.C
@@ -1879,9 +1879,9 @@ Foam::autoPtr<Foam::polyDistributionMap> Foam::fvMeshDistribute::distribute
 
 
     // Collect any zone names
-    const wordList pointZoneNames(mergeWordList(mesh_.pointZones().names()));
-    const wordList faceZoneNames(mergeWordList(mesh_.faceZones().names()));
-    const wordList cellZoneNames(mergeWordList(mesh_.cellZones().names()));
+    const wordList pointZoneNames(mergeWordList(mesh_.pointZones().toc()));
+    const wordList faceZoneNames(mergeWordList(mesh_.faceZones().toc()));
+    const wordList cellZoneNames(mergeWordList(mesh_.cellZones().toc()));
 
 
     // Local environment of all boundary faces
diff --git a/src/polyTopoChange/polyMeshAdder/polyMeshAdder.C b/src/polyTopoChange/polyMeshAdder/polyMeshAdder.C
index 51518f7ecd..af0cb09131 100644
--- a/src/polyTopoChange/polyMeshAdder/polyMeshAdder.C
+++ b/src/polyTopoChange/polyMeshAdder/polyMeshAdder.C
@@ -573,7 +573,7 @@ void Foam::polyMeshAdder::mergePointZones
 )
 {
     zoneNames.setCapacity(pz0.size() + pz1.size());
-    zoneNames.append(pz0.names());
+    zoneNames.append(pz0.toc());
 
     from1ToAll.setSize(pz1.size());
 
@@ -719,7 +719,7 @@ void Foam::polyMeshAdder::mergeFaceZones
 
 
     zoneNames.setCapacity(fz0.size() + fz1.size());
-    zoneNames.append(fz0.names());
+    zoneNames.append(fz0.toc());
 
     from1ToAll.setSize(fz1.size());
 
@@ -900,7 +900,7 @@ void Foam::polyMeshAdder::mergeCellZones
 )
 {
     zoneNames.setCapacity(cz0.size() + cz1.size());
-    zoneNames.append(cz0.names());
+    zoneNames.append(cz0.toc());
 
     from1ToAll.setSize(cz1.size());
     forAll(cz1, zoneI)