| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| 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 | ||
| Colbert | KOL-bərt | English | ||
| Colby | KOL-bee | English | ||
| Cole | KOL | English | ||
| Coleen | kah-LEEN | English | ||
| Coleman | - | English, Irish |