| Culloden | - | Scottish Name | Cullodena | - | Scottish Name |
| Cullodina | - | Scottish Name | Culzean | - | Scottish Name |
| Cumin | - | Scottish Name | Cumina | - | Scottish Name |
| Cumming | - | Scottish Name | Cundry | - | Arthurian Name |
| Cunini | - | Gaelic Name | Cunningham | - | Scottish Name |
| Cuong | - | Vietnamese Name | Cura | - | Latin Name |
| Curran | - | Gaelic Name | Curt | - | French Name |
| Curtis | - | French Name | Cush, Cushan, Cushi | - | Biblical Name |
| Cuth, Cuthah | - | Biblical Name | Cutler | - | English Name |
| Cwen | - | Anglo Name | Cwene | - | Anglo Name |
| Cy | - | Cyprien Name | Cy | - | Persian Name |
| Cyan | - | Australian Name | Cyanna | - | Korean Name |
| Cybil | - | Greek Name | Cydnee | - | American Name |
| Cydney | - | English Name | Cydni | - | United States Name |
| Cyerra | - | Irish Name | Cyla | - | Polish Name |
| Cyler | - | Dutch Name | Cylie | - | Chinese Name |
| Cyndi | - | American Name | Cynthia | - | Greek Name |
| Cynti | - | Greek Name | Cyprian | - | African Name |
| Cyprien | - | French Name | Cyprus | - | Biblical Name |
| Cyra | - | Australian Name | Cyrene | - | Biblical Name |
| Cyrenius | - | Biblical Name | Cyriel | - | Greek Name |
| Cyrille | - | Greek Name | Cyrus | - | Biblical Name |
| Cyst | - | Anglo Name | Czigany | - | Hungarian Name |
| Da-Xia | - | Chinese Name | Daamin | - | Muslim Name |
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