Hello
Sorry for delayed answer and thank you for your keenness to help...
Unhapilly it does not work. When I select data field in Object inspector, it does not change components name. When I click button by components name to invoke 'Edit component's name' dialog, I get error message like on picture bellow.
Answering your question, rarely, but I refer to DataField by code. I'm not sure what I should test, but I'll do my best to help you.