Neither of them are pleasing to my ear, but I'd choose
Anaïs over
Thaïs, because I like
Anaïs Nin and tend to prefer 3 syllable names.
...also, I think
Thaïs (which isn't used often, if at all, where I live) would get confused with
Therese.
This message was edited 3/16/2018, 5:29 PM