| Clarke | - | English Name | Clarke | - | Teutonic Name |
| Claron | - | West Indies Name | Clarus | - | Assyrian Name |
| Claudas | - | Arthurian Name | Claude | - | Cyprien Name |
| Claudio | - | Latin Name | Cláudio | - | Portuguese Name |
| Claudio | - | Philippines Name | Claudios | - | Dutch Name |
| Claudius | - | Assyrian Name | Claus | - | German Name |
| Clay | - | Greek Name | Clayborne | - | Teutonic Name |
| Clayburn | - | Teutonic Name | Clayden | - | English Name |
| Clayland | - | Teutonic Name | Clayton | - | English Name |
| Clayton | - | United States Name | Cleary | - | Irish Name |
| Cledwyn | - | Teutonic Name | Cleit | - | Scottish Name |
| Clement | - | Latin Name | Clement | - | Biblical Name |
| Clément | - | Cameroon Name | Clement | - | Teutonic Name |
| Clemente | - | Portuguese Name | Clementius | - | Dutch Name |
| Clemis | - | Assyrian Name | Clennan | - | Scottish Name |
| Cleon | - | Teutonic Name | Cleophas | - | Biblical Name |
| Clerc | - | Teutonic Name |
|
|