Is there a second spelling for this or am I confused? I know a more than one
Mireille, all French and there's no other spelling that I know of.
In French
Camille still has the L sound, it's actually more like a Y or a softer sound but it's there. I don't know why btn has "ka mee" as it's entry, "ka meey" or "ka meehl" would probably be more accurate or here since I'm bad at phonetic prn :)
http://www.forvo.com/search/camille/
Anyways, I say use it! It's pretty either way but
Camille is more accurate than Cami.