diff --git a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshToQuadEdgeMeshFilter.h b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshToQuadEdgeMeshFilter.h
index a5d198ebc69..3a89efdf7e3 100644
--- a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshToQuadEdgeMeshFilter.h
+++ b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshToQuadEdgeMeshFilter.h
@@ -50,7 +50,10 @@ class ITK_TEMPLATE_EXPORT QuadEdgeMeshToQuadEdgeMeshFilter : public MeshToMeshFi
   using InputMeshPointer = typename InputMeshType::Pointer;
   using InputMeshConstPointer = typename InputMeshType::ConstPointer;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
   using InputQEPrimal = typename InputMeshType::QEPrimal;
@@ -78,7 +81,10 @@ class ITK_TEMPLATE_EXPORT QuadEdgeMeshToQuadEdgeMeshFilter : public MeshToMeshFi
   using OutputMeshPointer = typename OutputMeshType::Pointer;
   using OutputMeshConstPointer = typename OutputMeshType::ConstPointer;
   using OutputCoordinateType = typename OutputMeshType::CoordinateType;
-  using OutputCoordRepType = OutputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using OutputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `OutputCoordRepType`. Please use `OutputCoordinateType` instead!") = OutputCoordinateType;
+#endif
   using OutputPointType = typename OutputMeshType::PointType;
   using OutputPointIdentifier = typename OutputMeshType::PointIdentifier;
   using OutputQEPrimal = typename OutputMeshType::QEPrimal;
diff --git a/Modules/Core/Transform/include/itkBSplineTransformInitializer.h b/Modules/Core/Transform/include/itkBSplineTransformInitializer.h
index dc607bcd958..f0e8eb122d0 100644
--- a/Modules/Core/Transform/include/itkBSplineTransformInitializer.h
+++ b/Modules/Core/Transform/include/itkBSplineTransformInitializer.h
@@ -64,7 +64,11 @@ class ITK_TEMPLATE_EXPORT BSplineTransformInitializer : public Object
   using IndexType = typename ImageType::IndexType;
   using ImagePointType = typename ImageType::PointType;
   using ImagePointCoordinateType = typename ImagePointType::CoordinateType;
-  using ImagePointCoordRepType = ImagePointCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using ImagePointCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `ImagePointCoordRepType`. Please use `ImagePointCoordinateType` instead!") =
+    ImagePointCoordinateType;
+#endif
 
   /** Types defined from transform traits. */
   using TransformPointer = typename TransformType::Pointer;
diff --git a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkBorderQuadEdgeMeshFilter.h b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkBorderQuadEdgeMeshFilter.h
index d4b75637a52..2c02f9036e4 100644
--- a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkBorderQuadEdgeMeshFilter.h
+++ b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkBorderQuadEdgeMeshFilter.h
@@ -93,7 +93,10 @@ class ITK_TEMPLATE_EXPORT BorderQuadEdgeMeshFilter : public QuadEdgeMeshToQuadEd
   using InputMeshType = TInputMesh;
   using InputMeshConstPointer = typename InputMeshType::ConstPointer;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputTraits = typename InputMeshType::Traits;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
@@ -113,7 +116,10 @@ class ITK_TEMPLATE_EXPORT BorderQuadEdgeMeshFilter : public QuadEdgeMeshToQuadEd
   using OutputMeshType = TOutputMesh;
   using OutputMeshPointer = typename OutputMeshType::Pointer;
   using OutputCoordinateType = typename OutputMeshType::CoordinateType;
-  using OutputCoordRepType = OutputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using OutputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `OutputCoordRepType`. Please use `OutputCoordinateType` instead!") = OutputCoordinateType;
+#endif
   using OutputPointType = typename OutputMeshType::PointType;
   using OutputTraits = typename OutputMeshType::Traits;
   using OutputPointIdentifier = typename OutputMeshType::PointIdentifier;
diff --git a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkDelaunayConformingQuadEdgeMeshFilter.h b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkDelaunayConformingQuadEdgeMeshFilter.h
index 2959bb28418..1c5818fa342 100644
--- a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkDelaunayConformingQuadEdgeMeshFilter.h
+++ b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkDelaunayConformingQuadEdgeMeshFilter.h
@@ -50,7 +50,10 @@ class ITK_TEMPLATE_EXPORT DelaunayConformingQuadEdgeMeshFilter
   using InputMeshType = TInputMesh;
   using InputMeshPointer = typename InputMeshType::Pointer;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputPointVectorType = typename InputPointType::VectorType;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
@@ -75,7 +78,10 @@ class ITK_TEMPLATE_EXPORT DelaunayConformingQuadEdgeMeshFilter
   using OutputMeshType = TOutputMesh;
   using OutputMeshPointer = typename OutputMeshType::Pointer;
   using OutputCoordinateType = typename OutputMeshType::CoordinateType;
-  using OutputCoordRepType = OutputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using OutputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `OutputCoordRepType`. Please use `OutputCoordinateType` instead!") = OutputCoordinateType;
+#endif
   using OutputPointType = typename OutputMeshType::PointType;
   using OutputPointIdentifier = typename OutputMeshType::PointIdentifier;
   using OutputCellType = typename OutputMeshType::CellType;
diff --git a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkParameterizationQuadEdgeMeshFilter.h b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkParameterizationQuadEdgeMeshFilter.h
index 55fa08cc7cf..779df453d62 100644
--- a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkParameterizationQuadEdgeMeshFilter.h
+++ b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkParameterizationQuadEdgeMeshFilter.h
@@ -70,7 +70,10 @@ class ITK_TEMPLATE_EXPORT ParameterizationQuadEdgeMeshFilter
   using InputMeshPointer = typename InputMeshType::Pointer;
   using InputMeshConstPointer = typename InputMeshType::ConstPointer;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputPointVectorType = typename InputPointType::VectorType;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
@@ -100,7 +103,10 @@ class ITK_TEMPLATE_EXPORT ParameterizationQuadEdgeMeshFilter
   using OutputMeshPointer = typename OutputMeshType::Pointer;
   using OutputMeshConstPointer = typename OutputMeshType::ConstPointer;
   using OutputCoordinateType = typename OutputMeshType::CoordinateType;
-  using OutputCoordRepType = OutputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using OutputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `OutputCoordRepType`. Please use `OutputCoordinateType` instead!") = OutputCoordinateType;
+#endif
   using OutputPointType = typename OutputMeshType::PointType;
   using OutputPointIdentifier = typename OutputMeshType::PointIdentifier;
   using OutputQEType = typename OutputMeshType::QEType;
diff --git a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkQuadEdgeMeshParamMatrixCoefficients.h b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkQuadEdgeMeshParamMatrixCoefficients.h
index ba8b7b0e51f..c276db145dc 100644
--- a/Modules/Filtering/QuadEdgeMeshFiltering/include/itkQuadEdgeMeshParamMatrixCoefficients.h
+++ b/Modules/Filtering/QuadEdgeMeshFiltering/include/itkQuadEdgeMeshParamMatrixCoefficients.h
@@ -35,7 +35,10 @@ class MatrixCoefficients
 public:
   using InputMeshType = TInputMesh;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputQEType = typename InputMeshType::QEType;
 
   MatrixCoefficients() = default;
@@ -60,7 +63,10 @@ class ITK_TEMPLATE_EXPORT OnesMatrixCoefficients : public MatrixCoefficients<TIn
 
   using InputMeshType = TInputMesh;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputQEType = typename InputMeshType::QEType;
 
   OnesMatrixCoefficients() = default;
@@ -90,7 +96,10 @@ class ITK_TEMPLATE_EXPORT InverseEuclideanDistanceMatrixCoefficients : public Ma
 
   using InputMeshType = TInputMesh;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
   using InputQEType = typename InputMeshType::QEType;
@@ -133,7 +142,10 @@ class ITK_TEMPLATE_EXPORT ConformalMatrixCoefficients : public MatrixCoefficient
 
   using InputMeshType = TInputMesh;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
   using InputQEType = typename InputMeshType::QEType;
@@ -188,7 +200,10 @@ class ITK_TEMPLATE_EXPORT AuthalicMatrixCoefficients : public MatrixCoefficients
 
   using InputMeshType = TInputMesh;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
   using InputQEType = typename InputMeshType::QEType;
@@ -245,7 +260,10 @@ class ITK_TEMPLATE_EXPORT IntrinsicMatrixCoefficients : public MatrixCoefficient
 
   using InputMeshType = TInputMesh;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputQEType = typename InputMeshType::QEType;
 
   InputCoordinateType m_Lambda;
@@ -281,7 +299,10 @@ class ITK_TEMPLATE_EXPORT HarmonicMatrixCoefficients : public MatrixCoefficients
 
   using InputMeshType = TInputMesh;
   using InputCoordinateType = typename InputMeshType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputPointType = typename InputMeshType::PointType;
   using InputVectorType = typename InputPointType::VectorType;
   using InputPointIdentifier = typename InputMeshType::PointIdentifier;
diff --git a/Modules/IO/MeshBase/include/itkMeshFileReader.h b/Modules/IO/MeshBase/include/itkMeshFileReader.h
index fd1da1086f1..4b26ca7af9d 100644
--- a/Modules/IO/MeshBase/include/itkMeshFileReader.h
+++ b/Modules/IO/MeshBase/include/itkMeshFileReader.h
@@ -98,7 +98,10 @@ class ITK_TEMPLATE_EXPORT MeshFileReader : public MeshSource<TOutputMesh>
   /** Define output mesh types */
   using OutputMeshType = TOutputMesh;
   using OutputCoordinateType = typename OutputMeshType::CoordinateType;
-  using OutputCoordRepType = OutputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using OutputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `OutputCoordRepType`. Please use `OutputCoordinateType` instead!") = OutputCoordinateType;
+#endif
   using OutputPointPixelType = typename OutputMeshType::PixelType;
   using OutputCellPixelType = typename OutputMeshType::CellPixelType;
   using OutputPointType = typename OutputMeshType::PointType;
diff --git a/Modules/Nonunit/Review/include/itkMultiphaseFiniteDifferenceImageFilter.h b/Modules/Nonunit/Review/include/itkMultiphaseFiniteDifferenceImageFilter.h
index 403791fc834..43fb46d82b2 100644
--- a/Modules/Nonunit/Review/include/itkMultiphaseFiniteDifferenceImageFilter.h
+++ b/Modules/Nonunit/Review/include/itkMultiphaseFiniteDifferenceImageFilter.h
@@ -181,7 +181,10 @@ class ITK_TEMPLATE_EXPORT MultiphaseFiniteDifferenceImageFilter : public InPlace
   using InputImagePointer = typename InputImageType::Pointer;
   using InputPointType = typename InputImageType::PointType;
   using InputCoordinateType = typename InputPointType::CoordinateType;
-  using InputCoordRepType = InputCoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using InputCoordRepType ITK_FUTURE_DEPRECATED(
+    "ITK 6 discourages using `InputCoordRepType`. Please use `InputCoordinateType` instead!") = InputCoordinateType;
+#endif
   using InputIndexType = typename InputImageType::IndexType;
   using InputIndexValueType = typename InputIndexType::IndexValueType;
   using InputSizeType = typename InputImageType::SizeType;