Help!! twin boy names?

My friend is expecting twins. She does not know the of them yet until birth, which she is due only in a few weeks time.. her and her husband have chosen the names for girl/girl or boy/girl but not boy/boy. she told me that she wants to name one of them William for sure but is confused for a name for the other one. She WAS thinking peyton or seth or preston but isn't too sure. any ideas? thanks!