I like it, but I prefer the simpler
Ianthe. Both names are lovely and very Greek, though, so it's a pretty good bet that I'd like 'em. Also, I love
Io, and getting to use that as a NN is appealing.
Annora or
Antonia Iolanthe -- Probably my favorite overall, though of
Annora and
Antonia, I prefer
Antonia on its own. I think this flows best, though, and I do like
Annora.
Emmelina
Iolanthe -- No, because I'm sick of all the
Em- names that are so popular right now, even if it is an alternate form. I also don't think they flow well together in syllable arrangement and name style.