Vesper is a unisex choice that seems to lean on the girls’ side. It hasn’t ranked in the US yet, so if you’re thinking of it for a boy, it’s not off limits!
Letitia is a old lady name that deserves a comeback.
Lucia is multicultural – so multicultural, in fact, that she works in English, German, Italian, Swedish, Norwegian, Danish, Romanian, Slovak, and Ancient Roman (if we could just find a way to get there). I’m sure there are other languages and cultures too – if you know, please reply in a comment!