| Cameron | Clan name meaning Bent nose. |
| Camhlaidh | A Gaelic name meaning crooked river. |
| Camp | Derived from a field or enclosure. |
| Camron | Variant of Cameron bent nose. |
| Camshron | A unique variant of Cameron. |
| Caraidland | From the land between the streams |
| Carlton | From the land between the streams |
| Carmichael | Friend of Saint Michael |
| Carson | Son of the dweller in the marsh. |
| Cauley | A descendant of the wolf. |
| Cawley | A descendant of the woodland. |
| Ceard | A name meaning a skilled smith. |
| Ceardach | A name meaning a workshop owner. |
| Chait | Derived from the month of Chaitra. |
| Chalmer | A name meaning a lord of the chamber. |
| Chalmers | A name meaning son of the chamberlain. |
| Chattan | Clan of the cats |
| Chisholm | Derived from a place of hazel trees. |
| Christal | A clear, transparent gemstone. |
| Christel | An icelike, clear crystal. |
| Chua | A surname meaning vegetable or herb. |
| Clach | A name meaning a stone or rock. |
| Cleit | A rocky cliff or dwelling |
| Clennan | Finnian's servant. |
| Cliamon | A bright, shining spirit. |
| Clunes | a resting-place, or meadow |
| Clyde | Refers to the Scottish Clyde river. |
| Coburn | Surname and place name. |
| Coira | A name meaning from the cauldron. |
| Coire | A name meaning a mountain hollow. |
| Coiseam | Steady; stable. |
| Colenso | from the dark pool |
| Colin | Victory of the people |
| Colina | Victory of the people |
| Colquhoun | From the narrow corner of land. |
| Cora | Heart, Maiden; From 'kore' meaning girl or maiden. Famous bearers: Persephone used the title Kore.; Maiden; Seething pool; A young maiden |
| Corey | Chosen; God's Servant; Hill hollow.; From the hollow; of the churning waters; Ravine.; From the round hill or hollow.; Seething pool; Variant of Cory meaning variously - From the round hill: seething pool: ravine |
| Cormag | A Scottish name meaning a charioteer. |
| Craig | Dwells at the crag |
| Crannog | An ancient lake dwelling. |