Christian? Possibly Kenneth, but that's a stretch and I'm not sure why I thought of it at all.
The American Girl character/doll known as Kit is really Mildred Kittredge, so it could also come from the last name.
I'm thinking it could also (without a really huge stretch) come from Kurt or Curtis.
Of course it could also be initials. Like the talking car in Knight Rider.
"It's one thing to be open-minded and quite another to be so open-minded your brains fall out."--Dear Abby
"Let other people push you around, and you deserve whatever bad things happen after that."--Lauren Bacall