| Cache | - | American Name | Cade | - | American Name |
| Caden | - | English Name | Cal | - | American Name |
| Calico | - | Hebrew Name | Calvary | - | Biblical Name |
| Camari | - | Celtic Name | Cameron | - | Scottish Name |
| Canaan | - | Biblical Name | Candid | - | American Name |
| Canh | - | Vietnamese Name | Carmi | - | Biblical Name |
| Carshena | - | Biblical Name | Carson | - | English Name |
| Carver | - | English Name | Cary | - | Welsh Name |
| Casey | - | Irish Name | Cassidy | - | Irish Name |
| Ceallach | - | Gaelic Name | Chandler | - | English Name |
| Charlie | - | English Name | Chau | - | Vietnamese Name |
| Chen | - | Chinese Name | Chephirah | - | Biblical Name |
| Chicahua | - | Nahuatl Name | Chiko | - | Japanese Name |
| Chipahua | - | Nahuatl Name | Chris | - | Greek Name |
| Christian | - | Greek Name | Citlali | - | Nahuatl Name |
| Claude | - | Latin Name | Cody | - | English Name |
| Cong | - | Chinese Name | Connor | - | Irish Name |
| Copper | - | English Name | Corey | - | Irish Name |
| Creola | - | American Name | Cricket | - | American Name |
| Cualli | - | Nahuatl Name | Cullen | - | Irish Name |
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