I love
Rosalie. It's one of my favorite
Rose- names, but it's not yet overused or trendy. I prefer
Violet to
Viola (which I pronounce VY-lah or VY-uh-lah, but I dislike vy-OH-lah and vee-OH-lah), though the former seems to be gaining in popularity. :-/ So I think
Rosalie is nicer, but you can't go wrong with either.