Baby boy middle names beginning with C

There are a good bit of names that sound nice but I have been stuck on the idea of going with a middle name that starts with C because my dad's name is Casey and our baby's initials would then be KC. My dad has 4 girls and all nieces so it's special that this will be the first boy in the family. He wanted a boy and I would like to honor him! 

My current last name is Clark, my boyfriend's name is Cam, and my boyfriend's dad's name is Chris so I think we would like to avoid those. My boyfriend likes Cinley but I kinda felt that it was a little feminine. I like Conley but he doesn't like it and I think it may also be too much of the same sound throughout all 3 names? I have always liked Cooper but it reminds my boyfriend of a dog he used to have lol. We like somewhat unique names. Any suggestions would be appreciated, thank you in advance!