No, I don't find either arrogant. It's true that they're both classy and sophistocated, but I don't get that snobby vibe from either name. In fact, I've always thought there's delightful earthiness and warmth about the name
Magdalene, and
Raphael has an artistic, bohemian feel to it.
Magdalene &
Raphael would make a fab sibset, BTW.