diff --git a/src/Mod/Part/App/PartFeature.cpp b/src/Mod/Part/App/PartFeature.cpp
index 7572d9b2796e..cf1ad0f40e37 100644
--- a/src/Mod/Part/App/PartFeature.cpp
+++ b/src/Mod/Part/App/PartFeature.cpp
@@ -315,16 +315,18 @@ App::ElementNamePair Feature::getExportElementName(TopoShape shape,
                 std::vector<int> ancestors;
                 if ( names.empty() ) {
                     // Naming based heuristic has failed to find the element.  Let's see if we can
-                    // find it by matching planes
+                    // find it by matching either planes for faces or lines for edges.
                     auto searchShape = this->Shape.getShape();
                     // If we're still out at a Shell, Solid, CompSolid, or Compound drill in
                     while (searchShape.getShape().ShapeType() < TopAbs_FACE ) {
                         auto shapes = searchShape.getSubTopoShapes();
-                        if ( shapes.empty() )
+                        if ( shapes.empty() ) // No more subshapes, so don't continue
                             break;
-                        searchShape = shapes.front();
+                        searchShape = shapes.front();   // After the break, so we stopped at innermost container
                     }
-                    mapped = TopoShape::chooseMatchingSubShapeByPlane(shape, searchShape);
+                    auto newMapped = TopoShape::chooseMatchingSubShapeByPlaneOrLine(shape, searchShape);
+                    if ( ! newMapped.name.empty() )
+                        mapped = newMapped;
                 }
                 for (auto& name : names) {
                     auto index = shape.getIndexedName(name);
diff --git a/src/Mod/Part/App/TopoShape.h b/src/Mod/Part/App/TopoShape.h
index 2cc5afa63b9b..0cc4dfd0e504 100644
--- a/src/Mod/Part/App/TopoShape.h
+++ b/src/Mod/Part/App/TopoShape.h
@@ -359,7 +359,7 @@ class PartExport TopoShape: public Data::ComplexGeoData
     /** @name Subelement management */
     //@{
     /// Search to see if a SubShape matches
-    static Data::MappedElement chooseMatchingSubShapeByPlane(const TopoShape& shapeToFind, const TopoShape& shapeToLookIn);
+    static Data::MappedElement chooseMatchingSubShapeByPlaneOrLine(const TopoShape& shapeToFind, const TopoShape& shapeToLookIn);
     /// Unlike \ref getTypeAndIndex() this function only handles the supported
     /// element types.
     static std::pair<std::string, unsigned long> getElementTypeAndIndex(const char* Name);
diff --git a/src/Mod/Part/App/TopoShapeExpansion.cpp b/src/Mod/Part/App/TopoShapeExpansion.cpp
index 222a3698ae5d..f55f69b1b526 100644
--- a/src/Mod/Part/App/TopoShapeExpansion.cpp
+++ b/src/Mod/Part/App/TopoShapeExpansion.cpp
@@ -5816,27 +5816,29 @@ bool TopoShape::getRelatedElementsCached(const Data::MappedName& name,
     return true;
 }
 
-Data::MappedElement TopoShape::chooseMatchingSubShapeByPlane(const TopoShape& shapeToFind, const TopoShape& shapeToLookIn)
+Data::MappedElement TopoShape::chooseMatchingSubShapeByPlaneOrLine(const TopoShape& shapeToFind, const TopoShape& shapeToLookIn)
 {
     Data::MappedElement result;
+    // See if we have a Face.  If so, try to match using a plane.
     auto targetShape = shapeToFind.getSubTopoShape("Face", true);
-    if ( ! targetShape.isNull() ) { // Try to match faces using planes
+    if ( ! targetShape.isNull() ) {
         int index = 0;
         for ( const auto& searchFace : shapeToLookIn.getSubTopoShapes(TopAbs_FACE)) {
             index++;    // We have to generate the element index.
             if ( targetShape.isCoplanar(searchFace) ) {
                 if ( ! result.name.empty() )
-                    return {};  // Found more than one, can't make a guess.  Future: return them all to the user?
+                    return {};  // Found more than one, invalidate our guess.  Future: return all matches to the UI?
                 result = shapeToLookIn.getElementName(("Face"+std::to_string(index)).c_str());
             }
         }
     }
+    // Alternatively, try to locate an Edge, and try to match.  Currently by exact equivalence; later can improve.
     targetShape = shapeToFind.getSubTopoShape("Edge", true);
     if ( ! targetShape.isNull() ) { // Try to match edges
         int index = 0;
         for ( const auto& searchEdge : shapeToLookIn.getSubTopoShapes(TopAbs_EDGE)) {
             index++;
-            if ( targetShape.isSame(searchEdge) ) { // TODO: edges that are collinearis really what we want
+            if ( targetShape.isSame(searchEdge) ) { // TODO: Test for edges that are collinear as really what we want
                 if ( ! result.name.empty() )
                     return {}; // Found more than one
                 result = shapeToLookIn.getElementName(("Edge"+std::to_string(index)).c_str());
diff --git a/src/Mod/PartDesign/PartDesignTests/TestTopologicalNamingProblem.py b/src/Mod/PartDesign/PartDesignTests/TestTopologicalNamingProblem.py
index c1a0f343285f..0b7e72c8be41 100644
--- a/src/Mod/PartDesign/PartDesignTests/TestTopologicalNamingProblem.py
+++ b/src/Mod/PartDesign/PartDesignTests/TestTopologicalNamingProblem.py
@@ -2222,6 +2222,124 @@ def testPD_TNPSketchPadSketchDelete(self):
         matrix1.A34 = 10  # Z offset by 10
         self.assertTrue(doc.Sketch001.Placement.Matrix == matrix1)
 
+    def testPD_TNPSketchPadSketchSplit(self):
+        """Prove that a sketch attached to a padded sketch shape does not have a problem when the initial sketch has geometry split"""
+        doc = App.ActiveDocument
+        App.activeDocument().addObject("PartDesign::Body", "Body")
+        doc.Body.newObject("Sketcher::SketchObject", "Sketch")
+        doc.Sketch.AttachmentSupport = (doc.XY_Plane, [""])
+        doc.Sketch.MapMode = "FlatFace"
+        geoList = []
+        geoList.append(Part.LineSegment(App.Vector(0, 0, 0), App.Vector(40, 0, 0)))
+        geoList.append(Part.LineSegment(App.Vector(40, 0, 0), App.Vector(40, 20, 0)))
+        geoList.append(Part.LineSegment(App.Vector(40, 20, 0), App.Vector(0, 20, 0)))
+        geoList.append(Part.LineSegment(App.Vector(0, 20, 0), App.Vector(0, 0, 0)))
+        doc.Sketch.addGeometry(geoList, False)
+        constraintList = []
+        constraintList.append(Sketcher.Constraint("Coincident", 0, 2, 1, 1))
+        constraintList.append(Sketcher.Constraint("Coincident", 1, 2, 2, 1))
+        constraintList.append(Sketcher.Constraint("Coincident", 2, 2, 3, 1))
+        constraintList.append(Sketcher.Constraint("Coincident", 3, 2, 0, 1))
+        # constraintList.append(Sketcher.Constraint("Horizontal", 0))
+        constraintList.append(Sketcher.Constraint("Horizontal", 2))
+        constraintList.append(Sketcher.Constraint("Vertical", 1))
+        constraintList.append(Sketcher.Constraint("Vertical", 3))
+        constraintList.append(Sketcher.Constraint("DistanceX", 0, 40))
+        constraintList.append(Sketcher.Constraint("DistanceY", 1, 20))
+        constraintList.append(Sketcher.Constraint("DistanceX", 0, 1, 0))
+        constraintList.append(Sketcher.Constraint("DistanceY", 0, 1, 0))
+        doc.Sketch.addConstraint(constraintList)
+        doc.recompute()
+        doc.Body.newObject("PartDesign::Pad", "Pad")
+        doc.Pad.Profile = (
+            doc.Sketch,
+            [
+                "",
+            ],
+        )
+        doc.Pad.Length = 10
+        doc.Pad.ReferenceAxis = (doc.Sketch, ["N_Axis"])
+        doc.Sketch.Visibility = False
+        doc.Pad.Length = 10.000000
+        doc.Pad.TaperAngle = 0.000000
+        doc.Pad.UseCustomVector = 0
+        doc.Pad.Direction = (0, 0, 1)
+        doc.Pad.ReferenceAxis = (doc.Sketch, ["N_Axis"])
+        doc.Pad.AlongSketchNormal = 1
+        doc.Pad.Type = 0
+        doc.Pad.UpToFace = None
+        doc.Pad.Reversed = 0
+        doc.Pad.Midplane = 0
+        doc.Pad.Offset = 0
+        doc.Pad.Refine = True
+        doc.recompute()
+        doc.Sketch.Visibility = False
+        doc.Body.newObject("Sketcher::SketchObject", "Sketch001")
+        doc.Sketch001.AttachmentSupport = (
+            doc.Pad,
+            [
+                "Face6",
+            ],
+        )
+        doc.Sketch001.MapMode = "FlatFace"
+        geoList = []
+        geoList.append(Part.LineSegment(App.Vector(5, 5, 0), App.Vector(5, 10, 0)))
+        geoList.append(Part.LineSegment(App.Vector(5, 10, 0), App.Vector(25, 10, 0)))
+        geoList.append(Part.LineSegment(App.Vector(25, 10, 0), App.Vector(25, 5, 0)))
+        geoList.append(Part.LineSegment(App.Vector(25, 5, 0), App.Vector(5, 5, 0)))
+        doc.Sketch001.addGeometry(geoList, False)
+        del geoList
+        constraintList = []
+        constraintList.append(Sketcher.Constraint("Coincident", 0, 2, 1, 1))
+        constraintList.append(Sketcher.Constraint("Coincident", 1, 2, 2, 1))
+        constraintList.append(Sketcher.Constraint("Coincident", 2, 2, 3, 1))
+        constraintList.append(Sketcher.Constraint("Coincident", 3, 2, 0, 1))
+        constraintList.append(Sketcher.Constraint("Vertical", 0))
+        constraintList.append(Sketcher.Constraint("Vertical", 2))
+        constraintList.append(Sketcher.Constraint("Horizontal", 1))
+        constraintList.append(Sketcher.Constraint("Horizontal", 3))
+        doc.Sketch001.addConstraint(constraintList)
+        doc.recompute()
+        doc.Body.newObject("PartDesign::Pad", "Pad001")
+        doc.Pad001.Profile = (
+            doc.Sketch001,
+            [
+                "",
+            ],
+        )
+        doc.Pad001.Length = 10
+        doc.Pad001.ReferenceAxis = (doc.Sketch001, ["N_Axis"])
+        doc.Sketch001.Visibility = False
+        doc.Pad001.Length = 10.000000
+        doc.Pad001.TaperAngle = 0.000000
+        doc.Pad001.UseCustomVector = 0
+        doc.Pad001.Direction = (0, 0, 1)
+        doc.Pad001.ReferenceAxis = (doc.Sketch001, ["N_Axis"])
+        doc.Pad001.AlongSketchNormal = 1
+        doc.Pad001.Type = 0
+        doc.Pad001.UpToFace = None
+        doc.Pad001.Reversed = 0
+        doc.Pad001.Midplane = 0
+        doc.Pad001.Offset = 0
+        doc.recompute()
+        doc.Pad.Visibility = False
+        doc.Sketch001.Visibility = False
+
+        self.assertAlmostEqual(doc.Pad.Shape.Volume,8000)
+
+        doc.Sketch.split(0, App.Vector(10,0,0)) # Geo 0 moves to Geo 3, create Geo4
+        doc.Sketch.split(4, App.Vector(30,0,0)) # Create Geo5
+        doc.Sketch.movePoint(4, 1, App.Vector(10,2,0), False)
+        doc.Sketch.movePoint(4, 2, App.Vector(30, 2, 0), False)
+        doc.recompute()
+        self.assertAlmostEqual(doc.Pad.Shape.Volume,7400)   # Prove the points moved
+        self.assertTrue(doc.Sketch001.isValid())    # Check for a TNP fail.
+        # If Sketch001 is still at the right start point, we are good.
+        self.assertTrue(doc.Sketch001.AttachmentOffset.Matrix == App.Matrix())
+        matrix1 = App.Matrix()
+        matrix1.A34 = 10  # Z offset by 10.
+        self.assertTrue(doc.Sketch001.Placement.Matrix == matrix1)
+
     def testPD_TNPSketchPadSketchConstructionChange(self):
         """Prove that a sketch attached to a padded sketch shape does not have a problem when the initial sketch has geometry changed from Construction"""
         pass  # TODO