| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Kassiopeia | - | Greek Mythology | ||
| Kastor | - | Greek Mythology | ||
| Katerina | - | Macedonian, Russian, Bulgarian, Greek, Late Roman | ||
| Katina | - | Greek, Macedonian | ||
| Kephalos | - | Greek Mythology | ||
| Kephas | - | Biblical Greek | ||
| Kepheus | - | Greek Mythology | ||
| Kerberos | - | Greek Mythology | ||
| Kiki | KEE-kee (English), kee-KEE (Greek) | English, German, Greek | ||
| Kirke | - | Greek Mythology | ||
| Kleio | - | Greek Mythology | ||
| Kleisthenes | - | Ancient Greek | ||
| Kleitos | - | Ancient Greek | ||
| Kleon | - | Ancient Greek | ||
| Kleopas | - | Biblical Greek |