K.C.
Cara, Kara, Alison, Allison, Alyson, Allyson, I've even seen Aleson, Katelyn, Kaitlyn, Kaitlin, Catelyn, Caitlyn, Catelin. I'd go with Kara (I'm partial to K names), Alyson (just like the way it looks), and Katelyn (again with the K name, and my little girl is Kate, so I just like that...(^_^)). There's no right or wrong here. The pronunciation of these names is not too confusing, except for the Kah-ra/ Care-a issue.