Wilhelmina is the best, but honestly, I really don't like the idea of having two girls with obviously feminized versions of male names PLUS boyish nns. Even if it isn't your intention it really does come off as "well, we were planning on two boys but it didn't work out that way so here's the next best thing."
You're entitled to your own opinions. You're not entitled to your own facts. -- Daniel Patrick Moynihan