| Cadal | A spirit of the great battle. |
| Caefca | A name meaning hollowed field. |
| Caerdin | Derived from the Welsh 'caer,' meaning 'fortress' or 'stronghold.' |
| Cantwine | Derived from Celtic, meaning 'white' or 'fair' and 'wine' or 'friend' |
| Carados | Latin, meaning 'dear' or 'beloved' and 'son' |
| Caratauc | Latin, meaning 'dear' or 'beloved' and 'warrior' |
| Carlysle | Scottish, meaning 'from the strong fortress' |
| Catacvs | Latin, meaning 'dear' or 'beloved' and 'warrior' |
| Catgen | Latin, meaning 'dear' or 'beloved' and 'born' |
| Catgual | Latin, meaning 'dear' or 'beloved' and 'valley' |
| Catguocaun | Possibly derived from 'catuarius,' meaning a brave or courageous person. |
| Ceadel | Variant of Cedric, means 'bounty' or 'generosity' |
| Cealfa | Means 'elf counsel' |
| Cempa | A name meaning a brave warrior. |
| Cenfus | A bold and ready warrior leader. |
| Cenhelm | A bold and courageous protector. |
| Cenhere | A bold and valiant army leader. |
| Ceolmaer | Battle-famous sailor |
| Ceolnoth | Battle-famous north |
| Chandon | A name meaning stone or rock place. |
| Cidd | A short name meaning a noble protector. |
| Cilda | Servant of the Lord |
| Cinon | A name of uncertain origin. |
| Cinuedu | Battle-lover, a Celtic name meaning fond of war |
| Cinuin | Battle-hardened warrior, a Celtic name meaning strong in battle |
| Cippa | To seize, a Latin name meaning to take or capture |
| Cistumucus | Possibly derived from Latin, meaning 'of the chest' or 'breast' |
| Clack | Chatterer; Large Man |
| Clvtorigi | Derived from Old English, possibly meaning 'clever origin' or 'clever birth' |
| Cohha | Old English name, possibly meaning 'battle' or 'warrior' |
| Coineus | Old English name, possibly meaning 'battle noble' or 'warrior noble' |
| Aevyrie | Ruler of the air |
| Agilbert | A bright and noble pledge. |
| Ailmar | Ruler of the sea, sea ruler |
| Crowford | Derived from Crow, meaning 'raven' or 'wise' |
| Cuelino | A name of ancient origin |
| Cuichelm | A helmet of living spirit |
| Cunotamus | Mighty, powerful, and strong |
| Cuthsige | Battle, fight, and victory |
| Cuthwin | Battle, fight, and friend |