| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| KOEN | KOON | Dutch | ||
| KOENRAAD | KOON-rah:t | Dutch | ||
| KOERT | KOORT | Dutch | ||
| KOFI | - | Western African, Akan | ||
| KOHAKU | ko-hah-koo | Japanese | ||
| KOHAR | - | Armenian | ||
| KOHARU | ko-hah-ṙoo | Japanese | ||
| KOHINOOR | - | Various | ||
| KOIOS | - | Greek Mythology | ||
| KOIT | - | Estonian | ||
| KOJO | - | Western African, Akan | ||
| KOKORO | ko-ko-ṙo | Japanese | ||
| KOLAB | - | Khmer | ||
| KOLBY | KOL-bee | English (Modern) | ||
| KOLDO | - | Basque |