Help! My son is 3 days old and needs a name!

My first son is 8 years old and his name is Trent Silver (Silver is a family name and Trent likes the idea of his brother having the middle name of Sterling.) I'm trying to keep nicknames in mind too- so if we went with Atreyu then I'm sure people would call him Trey, which is very similar to Trent. With Ezra, I'm sure he'd hear Ez a lot and if it's River then I'd call him Rio (Spanish for River.) I'm all for different names but *not* over-the-top or overused. I want something that goes well with my first son's name too..I just don't know! What do you think?