| Cotton | - | Teutonic Name | Coty | - | French Name |
| Court | - | Teutonic Name | Courtenay | - | Teutonic Name |
| Courtland | - | Teutonic Name | Courtlyn | - | American Name |
| Courtnay | - | Anglo Name | Courtney | - | Anglo Name |
| Cove | - | Teutonic Name | Coven | - | Irish Name |
| Coveney | - | Teutonic Name | Coventina | - | Anglo Name |
| Cowan | - | Gaelic Name | Cowin | - | Latin Name |
| Coy | - | English Name | Coyle | - | Gaelic Name |
| Coyotl | - | Nahuatl Name | Coz | - | Biblical Name |
| Cozamalotl | - | Nahuatl Name | Cozbi | - | Biblical Name |
| Cozette | - | French Name | Cozmo | - | Teutonic Name |
| Crag | - | English Name | Cragen | - | Welsh Name |
| Craig | - | Teutonic Name | Cranford | - | Teutonic Name |
| Cranley | - | Teutonic Name | Crannog | - | Scottish Name |
| Cranston | - | Teutonic Name | Craolyn Draw | - | English Name |
| Crawford | - | Teutonic Name | Crayton | - | Scottish Name |
| Creed | - | Teutonic Name | Creiddyladl | - | Arthurian Name |
| Creighton | - | Scottish Name |
|
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