I don't have any plan to actually transition, but for the sake of crossdreaming, I settled on the name Josie years ago.
There is a guy years ago that at the time was probably my best friend. He and I ended up losing contact and he moved away. I don't want to get into the details of why he and I lost contact, but I do miss him from time to time. He was one of the few people that I think ever really understood me. I never told him about my crossdreaming, but think on some level he just knew. Honestly, when I think back now, I think he was a crossdreamer too. There was just kind of this unspoken understanding between the two of us. It really is a shame that he's not around anymore, but I digress...
Years ago I had a thing for the actress Rachael Leigh Cook (who happens to be my avatar pic). She was in this movie Josie and the Pussycats, which my friend and I both loved. The movie was not a big hit, but we enjoyed the satirical humor of it, and Ms. Cook was adorable playing the role of Josie. She stimulated a lot of my crossdreaming in those days. My friend and I would often jokingly quote and reference that movie. There was a cute moment in the movie where Josie was feeling down about her band's music career and one of her bandmates says to her in an attempt to cheer her up, "Who's a rockstar?" Josie sheeplishly responds, "I am." My friend and I played softball together. Whenever I was feeling down about not playing well, to help me shake it off, he would say to me jokingly, "Who's an All-Star?" I would reply, "I am." I couldn't help but smile when we would have that exchange. He never once actually called me Josie, but I sort of became the 'Josie' in our little world of running jokes.
I've grown to love the name and adopted it as my female personna. Now it almost feels as much my name as my male name.