My sister's name is
Kirsten Beatrix so I adore it!
Beatrix is a very elegant, sweet, spunky name that really would work well as a first name in today's society. I recently have been loving
Beatrice but the more I say it the more cumbersome it seems for a little girl.
Beatrix on the other hand is light and more childish but would also work well for a teen or adult.
Bea,
Trix, or
Trixie would make nice nicknames that could be used at different stages of the girl's life if she found
Beatrix a bit too long.