| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| COSME | - | Portuguese, French | ||
| COSMIN | - | Romanian | ||
| COSMINA | - | Romanian | ||
| COSMO | KAWZ-mo | English | ||
| COSTACHE | kos-TAH-ke | Romanian | ||
| COSTANTINO | - | Italian | ||
| COSTANZO | - | Italian | ||
| COSTEL | ko-STEL | Romanian | ||
| CostellO | ||||
| COSTICĂ | kos-TEE-kə | Romanian | ||
| COSTIN | - | Romanian | ||
| Cotton | ['kɔtn] | |||
| Cottrell | ['kɔtrəl] | |||
| COTY | - | English (Modern) | ||
| Couch | [kautʃ] |