| Cong | - | Chinese Name | Coniah | - | Biblical Name |
| Conlan | - | Gaelic Name | Conley | - | Gaelic Name |
| Conn | - | Irish Name | Connah | - | Welsh Name |
| Connal | - | Celtic Name | Connelly | - | Irish Name |
| Conner | - | English Name | Connie | - | Latin Name |
| Connolly | - | Irish Name | Connor | - | English Name |
| Conor | - | Irish Name | Conrad | - | German Name |
| Conroy | - | Gaelic Name | Consolata | - | Italian Name |
| Constance | - | Latin Name | Constant | - | French Name |
| Constanta | - | Romanian Name | Constantin | - | Italian Name |
| Constantina | - | Australian Name | Constantine | - | Latin Name |
| Constantinos | - | English Name | Constanza | - | Australian Name |
| Consuelo | - | Spanish Name | Content | - | American Name |
| Conway | - | Gaelic Name | Conyers | - | American Name |
| Cooper | - | English Name | Coorah | - | Aborigin Name |
| Coorain | - | Australian Name | Coos | - | Biblical Name |
| Copeland | - | English Name | Copper | - | English Name |
| Cora | - | Scottish Name | Corabelle | - | Greek Name |
| Corah | - | Greek Name | Coral | - | English Name |
| Coralai | - | American Name | Coralee | - | Latin Name |
| Coralie | - | French Name |
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