I pronounce it 'KOZ-ih-muh' (but it can also be pronounced 'koh-SEE-muh').
I love it and I think it's very usable.
Cosima BeatrixCosima NepheleCosima SylvieCosima DaphneCosima LiliasCosima LucyCosima XantheCosima WinifredCosima JunoCosima FlorenceCosima Charlotte
Sometimes sentences don't end the way you think they salad.