I used to work in an office in London with a man called Barnett Barnett and in the same office at the same time was Andy Beverley Barnett.

As for my own name; the only version I have heard being used for a woman is Robin/ Robyn. Rab, Rob, Rabbie, Robbie and Robert all seem to be exclusively male.

My brothers name is Duncan and I am not aware of a variant of that for women