| Constantine Dwyne | Steadfast and darkhaired one. |
| Corbie | A name meaning dark raven. |
| Cordelle | A name meaning cord maker. |
| Cordie | A variant meaning small heart. |
| Cordill | A name meaning heart of the hill. |
| Corea | A name meaning maiden or young girl. |
| Corio | Derived from a leather worker. |
| Corneilius | A variant of the name Cornelius. |
| Cornelias | Derived from the Latin word for horn. |
| Corneliu | Romanian name meaning hornshaped. |
| Cornellious | A noble name meaning hornbearer. |
| Cornellus | Latin origin meaning hornshaped. |
| Cornelous | A name meaning horn or strength. |
| Corsabrin | A unique name of uncertain origin. |
| Cortes | Spanish surname meaning the courteous. |
| Cortis | An English name meaning the courtly. |
| Cortize | A modern name of uncertain meaning. |
| Courtes | One who is very courteous. |
| Courtez | A name meaning polite person. |
| Courtis | One who lives at the court. |
| Cowessess | Named for a First Nations leader. |
| Craeg | Derived from the Gaelic word for rock. |
| Craege | A variant spelling meaning rocky cliff. |
| Crag | Refers to a steep or rugged cliff face. |
| Crai | A name meaning a dweller by the rock. |
| Craigg | A variant form meaning rocky outcrop. |
| Craigie | A small or rocky place of residence. |
| Cravin | A name meaning one who is yearning. |
| Cray | Derived from a word meaning fresh water. |
| Craye | A variant name meaning fresh water. |
| Crayg | A phonetic spelling meaning a rock. |
| Creg | A short form of the name Gregory. |
| Cregge | An English surname of locative origin. |
| Crews | Is symbolic of Christ |
| Creyg | A variant spelling of the word crag. |
| Criege | A name meaning a rocky cliff side. |
| Criegg | A variation meaning a steep rock. |
| Cruiz | Cross, crucifix |
| Cruze | A journey or a crossing of seas. |
| Cufel | A name of uncertain ancient origin. |