I like
Katalina,
Autumn,
Alessandro,
Jade,
Lily,
Rosalind and
BeauReuben is okay, so is
Saige, but I prefer it without the i.
My favorite for the girl is
Rosalind and for a boy
Alessandro, but I wouldn't want to actually use
Alessandro if I wasn't at least somewhat associated with the culture. Well, maybe as a middle name.
Keyla confuses me. Is it pronounced like
Kayla (if so, why not spell it that way?) or is it key-luh, in which case there may need to be a different spelling that makes that clearer and not look like a typo of
Kayla or perhaps it could be changed to
Keely.
None are awful. I could see using Cove or
Onyx as a middle name.
I don't like when twins have the same letter so I wouldn't do
Autumn and
Archie or
Reuben and
Rosalind.
It might be nice if one of them picks the first name of one and the other picks the middle name for the same one, as long as they both agree.
Katalina Jade and
Beau AlessandroReuben Beau and
Autumn RosalindReuben Cove and
Lily Autumn