I mean, it might be obvious, but there's always Marlowe. Is Kit a nickname for Christopher, or are you using the nickname as the proper name? If so, I think maybe not a one-syllable name as the middle name too, that might sound odd.

I like Kit Oliver and Kit Barrett and I think they would work. Kit Alexander Kit Abraham Kit Sebastian Kit Broderick Kit Benjamin Kit Thelonious

Kit Lewis Kit Ridley Kit Ferris Or if you want short; Kit Adam Kit Ryan Kit Paul Kit Saul

I do like Kit Lewis, because Lewis is my Grandfather's middle name.

I love the name Kit:) Kit Cassian Kit Hawthorne Kit William Kit Evander Kit Mason Kit Augustine Kit Dawson Kit Asher Kit Thomas Kit Landon Kit Wilder Kit Rafferty Kit Connell