| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Klement | - | Czech, Slovak | ||
| Klementina | - | Slovene, Croatian | ||
| Kleon | - | Ancient Greek | ||
| Kleopas | - | Biblical Greek | ||
| Kleopatra | - | Ancient Greek | ||
| Kleopatros | - | Ancient Greek | ||
| Kliment | klee-MYENT (Russian) | Russian, Ukrainian, Bulgarian, Macedonian | ||
| Klimentina | - | Macedonian | ||
| Klopas | - | Biblical Greek | ||
| KnÚTr | - | Ancient Scandinavian | ||
| Kobe (1) | - | Dutch | ||
| Kobina | - | Western African, Akan | ||
| Kobus | KO-bus | Dutch | ||
| Koen | KOON | Dutch | ||
| Koenraad | KOON-rah:t | Dutch |