I like
Camille slightly more, I like it with the nn
Millie.
I have known one
Camille (she was about 5 or 6 when I knew her, she had red hair) and I knew a
Camilla as well (about 11 when I knew her).
I'd consider using
Camille as a middle name but
Grant had a fling (before he met me) with a girl named
Camilla so not sure about that. Maybe if I had a child in the future and I wasn't with him (he wasn't the father)