You know how it can sometimes feel like you're pulling character names out of a dark, unmentionable space (I'm talking about the kitchen junk drawer, sicko).
The Shelftalker blog at Publishers Weekly has a great find: a book and website called The Baby Name Wizard.
Check out Shelftalker to get the links and see how it all works. Or, just go straight to the Baby Name Wizard. Be prepared for a timesuck.
Thanks to Nina Hess for the suggestion.