C
- cleveland
- clever
- cliff
- clifford
- cliffy
- clifton
- clint
- clinton
- clio
- clipper
- clive
- clivia
- clo
- clodagh
- cloe
- clothilde
- clotilde
- cloud
- clous
- clover
- clovis
- cloyd
- cly
- clyde
- clyve
- co
- cob
- coba
- cobain
- cobb
- cobey
- cobi
- cobie
- cobus
- coby
- coc
- cochran
- cock
- coco
- codee
- codey
- codi
- codie
- cody
- coe
- coelestinus
- coelho
- coen
- coenraad
- coert
- coffey
- cogan
- cohen
- cok
- coke
- col
- colan
- colas
- colbie
- colby
- cold
- cole
- coleen
- coleman
- colene
- colet
- colette
- coley
- colin
- colina
- colinda
- coline
- coll
- colla
- collard
- colleen
- collene
- collette
- collie
- collier
- collin
- colline
- collins
- colly
- colm
- colo
- colomba
- colombe
- colon
- colson
- colt
- colten
- colter
- colton
- coltrane
- colum
- colvin
- colwyn
- combo
- come
