| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Cleveland | KLEEV-lənd | English | ||
| Cliff | KLIF | English | ||
| Clifford | KLIF-ərd | English | ||
| Clifton | KLIF-tən | English | ||
| Clint | KLINT | English | ||
| Clinton | KLIN-tən | English | ||
| Clive | KLIEV | English | ||
| Clotilda | klə-TIL-də | English | ||
| Clover | KLO-vər | English (Rare) | ||
| Clyde | KLIED | English | ||
| Coby | KO-bee | English | ||
| Codie | KO-dee | English (Modern) | ||
| Cody | KO-dee | English, Irish | ||
| Cohen | KO-ən | English | ||
| Col | - | Medieval English |