| Chrysten | Follower of Christ |
| Churchil | An English name meaning church on a hill. |
| Cidrich | A name meaning a powerful ruler of kin. |
| Cinbran | Spear of the Lord |
| Cinglas | Battle-hardened warrior, a Celtic name meaning strong in battle |
| Cingualan | Descendant of the Cingual tribe, a Celtic name indicating heritage |
| Cini | Small, a Celtic name meaning diminutive or small in size |
| Cinnhor | Fair-haired, a Celtic name referring to physical appearance |
| Clac | Possibly derived from Latin, meaning 'clear' or 'bright' |
| Clarembald | Derived from Old French, meaning 'bright shield' or 'shining protector' |
| Clavin | Derived from the Latin for bald. |
| Clotuali | Derived from Old English, meaning 'famous ruler' or 'renowned leader' |
| Coenhelm | Old English name, possibly meaning 'people's helmet' or 'common protection' |
| Cofa | Old English name, possibly meaning 'calf' or 'young bull' |
| Colea | Swarthy; Black; Black-haired |
| Commius | Latin name meaning 'of the people' or 'public' |
| Condaf | Possibly derived from 'con' meaning 'with' and 'daf' meaning 'dove' |
| Congen | Old English name meaning 'born of the family' |
| Conhinoci | Possibly derived from 'con' meaning 'with' and 'hinoci' meaning 'noble' |
| Aethelwald | Old English name meaning 'noble ruler of the forest' |
| Agoran | A name meaning marketplace. |
| Agwisance | A name meaning wise counsel. |
| Ailbriht | Bright fame, famous and bright |
| Conthigirni | Great lord, great ruler |
| Cuchein | Derived from Cuch, meaning 'hollow' or 'cave' |
| Cunobarrus | Battle lord, or noble warrior |
| Cunobelinus | Battle lord, or noble warrior |
| Cunovindus | Born of the people, victorious |
| Cutha | Known as a famous or renowned one. |
| Cuthgils | Battle, fight, and victory |
| Cvnaci | From the valley, valley dweller |
| Cydrych | One who is present or face to face. |
| Cynegels | An old name meaning royal noble. |
| Cynog | A highborn and noble chief. |
| Cynwal | A powerful royal guardian. |
| Cyny | A descendant of the royalty. |
| Cyppel | A dweller by the chapel. |
| Daeddi | Derived from Welsh, meaning 'noble and wise' |
| Dalles | Resting Place; Meadow Dwelling |
| Deora | An Irish name meaning golden one. |