Xanthy would look better with
Hayley and
Skye, but I prefer
Xanthe (I don't think the pronunciation will be a very big issue, the only thing I think is weird that you (English speakers) don't pronounce the X as an X, but as a Z (
Xanthe would be KSAHN-tu for me)). one more thing: I'm still rooting for
Iris Chrysanthe ;)