- Canan
- Canon
- Cannon
- Carel
- Carolos
- Carolus
- Carvel
- Carvell
- Chance
- Chandler
- Chane
- Chaney
- Chanler
- Channing
- Chapin
- Chappel
- Chappell
- Charlemagne
- Charles
- Charlot
- Chaunce
- Chauncey
- Chauncy
- Chayne
- Cheney
- Chev
- Cheval
- Chevalier
- Chevell
- Chevi
- Chevy
- Cheyne
- Choncey
- Christien
- Christofor
- Christophe
- Ciel
- Claud
- Claude
- Clovis
- Colan
- Colbert
- Colbey
- Colin
- Collin
- Collins
- Colvile
- Colvill
- Colville
- Colyn
- Corben
- Corbett
- Corbin
- Corby
- Corbyn
- Cort
- Cortland
- Corvin
- Coty
- Court
- Courtenay
- Courtland
- Courtnay
- Coyan
- Coyne
- Cretien
- Curcio
- Curt
- Curtice
- Curtis
- Curtiss