Help choosing names?

The characters are twins, and are half demon, but they aren't entirely evil because of how they were raised.

For the girl, I'm trying to decide between:

Kismet
Copeland
Jodelle
Josephina
Aurora

Any other suggestions? Names with religious meanings would be good.

For the boy, I'm pretty certain I'm going with Cain, unless you have a suggestion that I like better.

Thanks for the help!