| Chaves | popular surname |
| Cepek | One who is blind or sightless. |
| Cabail | Leader of the people |
| Cacumattus | Battle-hardened warrior |
| Cada | Orphaned Animal |
| Cadal | A spirit of the great battle. |
| Cadfan | A warrior of the holy battle. |
| Cadwal | A ruler of the great battle. |
| Cadwared | A name meaning battle guardian. |
| Cadwell | Cold Spring or Stream or Well |
| Cadwgon | Battle-famous one |
| Caecca | Battle-hardened |
| Caefca | A name meaning hollowed field. |
| Caege | Battle-hardened |
| Caegel | A name meaning a small key. |
| Caegi | Battle-famous one |
| Caegin | From the Gaelic 'caoin,' meaning 'fair' or 'beautiful.' |
| Caegla | Derived from the Gaelic 'caol,' meaning 'slender' or 'narrow.' |
| Caelci | Possibly derived from the Latin 'caelum,' meaning 'heaven' or 'sky.' |
| Caelic | From the Latin 'caelum,' meaning 'heaven' or 'sky.' |
| Caerda | Possibly derived from the Welsh 'caer,' meaning 'fortress' or 'stronghold.' |
| Caerdin | Derived from the Welsh 'caer,' meaning 'fortress' or 'stronghold.' |
| Caetti | Possibly derived from the Gaelic 'cait,' meaning 'brilliant' or 'shining.' |
| Cafa | Derived from the Gaelic 'cafa,' meaning 'battle' or 'war.' |
| Cafna | Possibly derived from the Gaelic 'cafn,' meaning 'battle' or 'war.' |
| Cafnoth | Derived from the Gaelic 'cafn,' meaning 'battle' or 'war.' |
| Calemund | Possibly derived from the Latin 'calendae,' meaning 'first day' of the month. |
| Caliburn | Derived from the Latin 'caliburnus,' meaning 'sword' or 'blade.' |
| Calunoth | Possibly derived from the Latin 'calumna,' meaning 'false accusation.' |
| Calwa | Derived from the Gaelic 'cal,' meaning 'beauty' or 'loveliness.' |
| Camdon | Enclosed Valley |
| Cameleac | Possibly derived from the Latin 'camelus,' meaning 'camel.' |
| Camlach | Derived from the Gaelic 'cam,' meaning 'crooked' or 'twisted.' |
| Camulorix | Possibly derived from the Latin 'camulus,' meaning 'beauty' or 'loveliness.' |
| Canains | Derived from the Gaelic 'can,' meaning 'fair' or 'beautiful.' |
| Cantiori | Possibly derived from the Latin 'cantio,' meaning 'song' or 'music.' |
| Cantiorix | Derived from the Latin 'cantio,' meaning 'song' or 'music.' |
| Cantwine | Derived from Celtic, meaning 'white' or 'fair' and 'wine' or 'friend' |
| Carados | Latin, meaning 'dear' or 'beloved' and 'son' |
| Caranacus | Latin, meaning 'dear' or 'beloved' and 'noble' |