oh that happens a lot in Germany. Polish immigrants give their kids German names but aren't familiar with naming trends and choose something really dated. I've met Polish girls named Dagmar, Beate, Agathe and Susanne all of which are really dated here.
Beate (if pronounced be-ah-tay) is one that's actually kind of pretty... I've only ever met one in Canada though (and she was young). I like it better than Beatrice anyway. It's not common in Canada at all.