| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Klara | KLAH-rah (German, Russian, Polish) | Swedish, Norwegian, Danish, Icelandic, German, Russian, Ukrainian, Polish, Slovene, Croatian | ||
| Klasina | klah-SEE-nah | Dutch | ||
| Klaudie | - | Czech | ||
| Klaudija | - | Croatian | ||
| Klaudio | - | Croatian | ||
| Klazina | klah-ZEE-nah | Dutch | ||
| Kleisthenes | - | Ancient Greek | ||
| Kleitos | - | Ancient Greek | ||
| 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 |