Celeste and Celestina are obvious ones (and female) that you already know. Sora is Jpns. for sky and used as a unisex name... Not sure if that's close enough though.
*vote on my name pics at
http://www.babynames.com/Names/namelist.php and
http://www.behindthename.com/polls/search.php?searchtype=userid&terms=33210&when=all*