| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Konstantinos | kon-stahn-DEE-nos | Greek | ||
| KorË | - | Greek Mythology | ||
| Koralia | - | Greek, Late Greek | ||
| Kore | - | Greek Mythology | ||
| Korina | - | Greek | ||
| Korinna | - | Ancient Greek | ||
| Kosmas | - | Ancient Greek | ||
| Kreios | - | Greek Mythology | ||
| Kreskes | - | Biblical Greek | ||
| Kronos | - | Greek Mythology | ||
| Kynthia | - | Greek Mythology | ||
| Kyriake | - | Greek | ||
| Kyriaki | - | Greek | ||
| Kyriakos | - | Greek, Ancient Greek | ||
| Kyrillos | - | Ancient Greek |