Going purely on sound, it's quite a nice name and it works fine with
Peter, but it doesn't have the same solidity to me. Also, what beethoven said about
John Calvin. I just had a look at the wikipedia article on Calvinism and its four-point doctrine, and I didn't find it at all appealing.
Calvin Klein is quite a negative association for me, too, as I'm always seeing it around the waist of those annoying kids that wear saggy pants!