Amazingly you can break a lot of simplicity of Maya by simply having 2 objects named the same thing.
In the following, if you were to type "select ball" Maya will return an error: or "setAttr ball.ty 100;" or basically any command that doesn't use the full path of the object. which is very common.( in Maya default and in many online scripts)
// Error: line 1: More than one object matches name: ball
"group1| ball" & "group2|ball"
Obviously this is not ideal.
In my experience I've found it is just easier to give every node in Maya a unique name and avoid name clashing as much as possible.
However. The duplicate and duplicate with transform in Maya no longer has any options that you can customize, and by default is not set to rename children.
so if you duplicate "group2|ball" you will get "group3|ball" as it only cares about objects in the same parent space.
I'm not exactly why it was decided to remove the options for duplicate and duplicate with transform , but I'm not a fan.
So I hijack the scripts and put them in my prefs/scripts/ directory and let it ignore the embedded Maya commands.
for Duplicate do a "whatIs performDuplicate.mel" and copy paste that script into your prefs dir.
then edit that script with the info below
find the line that says :
int $renameChild = 0;
and replace the 0 with a 1
int $renameChild = 1;
for Duplicate with Transforms its a little easier, as it just uses the duplicate command , so you can add the following as a script in your prefs/scripts/ dir.
global proc DuplicateWithTransform ()
evalEcho("duplicate -rc -smartTransform")
the nice thing is, Duplicate Special still has an option box (for now) so if you want to duplicate a bunch of objects and retain non-unique child names, you can.
hope this helps