| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Jocasta | jo-KAS-tə (English) | Greek Mythology (Latinized) | ||
| Kadmos | - | Greek Mythology | ||
| Kalliope | - | Greek Mythology | ||
| Kallisto | - | Greek Mythology, Ancient Greek | ||
| Kalypso | - | Greek Mythology | ||
| Karme | - | Greek Mythology | ||
| Kassandra | kə-SAN-drə (English) | Greek Mythology, Ancient Greek, English (Modern) | ||
| Kassiopeia | - | Greek Mythology | ||
| Kastor | - | Greek Mythology | ||
| Kephalos | - | Greek Mythology | ||
| Kepheus | - | Greek Mythology | ||
| Kerberos | - | Greek Mythology | ||
| Kirke | - | Greek Mythology | ||
| Kleio | - | Greek Mythology | ||
| Klotho | - | Greek Mythology |