Calvin is nice. I had a bit of a name-crush on it a while back. Of your combos, I like:
Calvin AmbroseCalvin ArthurCalvin CharlesCalvin JeromeCalvin LeopoldCalvin OswaldCalvin TheobaldCalvin TychoCalvin Wallace
And may I suggest
Calvin Clark?
Clark's another one I've been liking recently, and I think it fits nicely with
Calvin.