Camilla - Bit uber posh
Camille - Pretty, I would attempt to pronounce it the French way with the double ll being a sort of y sound. Or are you thinking more like - 'Ka-mill'
Sylvie - very cute and pretty, I know a little girl called Sylvie and she is absolutely gorgeous in every way.
Josephine (Josie) - love how it sounds a flows of the tongue and Josie is cute.
Clara - really like this too, I loved it since watching Back to The Future III that had the character Clara Clayton.
Ada - Very old lady, but I understand it's fairly popular these days
Rose - Lovely, a very beautiful flower, if not the most beautiful flower.
Fia (Fiadh) - Fee-uh? Vee-uh? Feeve? I have no idea how this should be pronounced, I would have assumed Fee-uh but the version in brackets confuses me.
Lois - really lovely, if the English pronunciation, if in Wales it will probably be pronounced Loyce which I think is horrible. It's slightly unusual but also very familiar (Lois Lane, Superman).
Lovely choices, good luck!