What TV show are these witch names from?

Cordelia is from Buffy the Vampire Slayer (though I don't believe the character was a witch...). The others aren't really "witchy" either... they're certainly not traditional, at any rate. Natasha and Nadia are of Russian decent, Claudia, I believe is French, Cat (short for Catherine, I ume) would be English, Dahlia is probably Indian, and the others are fairly modern inventions.