Unique names for a baby girl?

I'm not pregnant. My sister-in-law is. She's having a girl, she's due on Feb. 4th [: ! My brother and her are still stuck on names for her. I wanna give them some good suggestions. Like, a unique name that isn't weird. It has to be original, but not TOO weird. I like the names Gemma, and Raine. What do you think? Any suggestions?