From your girls, I like
Beatrice and
Bibiana.
Bridget is also okay. I'm not sure how useable
Bibiana is in real life, but it's kind of interesting.
I like
Benjamin and love
Benedict.
Bela is so
Bela Lugosi, and so of course it gets ten bamf points for that simple fact - but I think there's little chance of getting people to say it right, and a little boy called
Bela (or, as people will think "
Bella") is
going to be teased. I do think that
Bela's kind of amazing, but if I came across anyone called it, I'd assume their parents were Hungarian or geeky old horror movie buffs.