Camila Renee (nn Mila or Mia) - I think this is really fresh, but still classy. I vote for this one.
Gianna Carin (nn Gia) - This is pretty too, although I feel like Gianna Renee flows better. The reason I personally wouldn't use this is that I wouldn't feel confident in pronunciation. (Gee-anna right?)
Lillian Simone (nn Lilly) - doesn't stand out to me, but it's fine.