| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Cassie | KAS-ee | English | ||
| Cassius | KASH-əs (English), KAS-ee-əs (English) | Ancient Roman, English | ||
| Cate | KAYT | English (Rare) | ||
| Cateline | - | Medieval French | ||
| Catharine | KATH-ə-rin, KATH-rin | English | ||
| Cathasach | - | Ancient Irish | ||
| Catherin | KATH-ə-rin, KATH-rin | English (Rare) | ||
| Catherina | kath-ə-REE-nə, kə-THREE-nə | English (Rare) | ||
| Catherine | ka-tə-REEN (French), ka-TREEN (French), KATH-ə-rin (English), KATH-rin (English) | French, English | ||
| Cathleen | kath-LEEN | Irish, English | ||
| Cathryn | KATH-rin | English | ||
| Cathy | KATH-ee | English | ||
| Cato (1) | - | Ancient Roman | ||
| Cavan | - | English | ||
| Cayden | KAY-dən | English (Modern) |