I was fortunate to have been renamed by my older sister at age three with a first name that I now love. My middle name has been more of challenge and, as others have suggested, you and I can try out some favs and see how it feels for a bit. As an old thang I felt comfortable, at first, with using my old first name as my middle name. I reasoned that my past life was largely inescapable and the truth of what I had experienced to get here. Now a year into my transition I feel more uncertain and less sure. Initially I felt, none of the firm "I am a woman" sense but certain that I was never a real boy or man. My transition has allowed me to feel much more deeply the hidden depths of a non binary journey and I may yet feel I have become a woman.
In short it is important to give yourself time and space to give yourself some "try outs." This is a really nice feature of transition. IMO