- Cael
- Caine
- Carlile
- Carlisle
- Carlton
- Carver
- Cedric
- Cedrick
- Chad
- Champ
- Champion
- Chap
- Chance
- Charles
- Charleston
- Charlie
- Chauncey
- Chip
- Clay
- Clayburn
- Clayton
- Cleaveland
- Cleavland
- Cliff
- Clifford
- Clift
- Clifton
- Clint
- Clive
- Cobb
- Colden
- Coleton
- Collier
- Colston
- Colten
- Colter
- Colton
- Coney
- Corbin
- Coulter
- Covert
- Covey
- Crane
- Cranford
- Craven
- Crawford
- Cromwell
- Crosley
- Crowell
- Cuthbert
- Cutler
- Cyd