I also doubt the meaning! - Rox is right, moon in Greek is selene or pheggari - but I rather like it, it does have a nice sound. I'd probs go with
Nea for short. It reminds me a bit of
Naima (na ee ma) and Neaera (nee air a)
There's also noema, meaning thought or thought about:
http://en.wikipedia.org/wiki/Noema