| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| KnÚTr | - | Ancient Scandinavian | ||
| Knud | KNOOD | Danish | ||
| Knut | KNOOT (German) | Swedish, Norwegian, Danish, German | ||
| Knute | - | Norwegian | ||
| Koa | - | Hawaiian | ||
| Koba | - | Georgian | ||
| Kobina | - | Western African, Akan | ||
| Kofi | - | Western African, Akan | ||
| Kohaku | ko-hah-koo | Japanese | ||
| Kohar | - | Armenian | ||
| Koharu | ko-hah-ṙoo | Japanese | ||
| Koit | - | Estonian | ||
| Kojo | - | Western African, Akan | ||
| Kokoro | ko-ko-ṙo | Japanese | ||
| Kolman | KAWL-mahn | German (Rare) |