To be honest, I'd use either of them in a heartbeat, but
Beatrix has been my #1 name for quite a while now. I prefer it to
Beatrice mainly because it seems more versatile; a girl named
Beatrice might resent having an "old-fashioned" name for a few years, but
Beatrix seems like a name that a lot of different personalites could pull off. There are also a ton of nn options. I'd probably call my daughter
Bea (bay-ah), but she could also go with something like
Bee,
Trixie, etc. if they suited her better. Compared to
Beatrice,
Beatrix has so much more strength and energy as well without losing any elegance. I'm just utterly enamoured of it.
My favorite
Beatrix combo is
Beatrix Lily Constance. Others I've toyed with for a while are
Beatrix Gwendolyn or
Beatrix Maria Victoria.
Beatrix Lyra and
Beatrix Winter also popped into my head about three seconds ago, and I love them.
To be fair to
Beatrice:
Beatrice Sophia Adelaide,
Beatrice Margaret,
Beatrice Elaine,
Beatrice Amarantha,
Beatrice Eve Ceridwen.