| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| KLAUDIJS | - | Latvian | ||
| KLAUDIO | - | Croatian | ||
| KLAUDIUSZ | KLOWT-yuwsh | Polish | ||
| KLAUS | KLOWS (German, Finnish) | German, Danish, Norwegian, Finnish | ||
| KLAVA | - | Russian | ||
| KLAVDIJA | - | Slovene | ||
| KLAVDIYA | KLAHV-dee-yah (Russian) | Russian, Ukrainian, Bulgarian | ||
| KLAZINA | klah-ZEE-nah | Dutch | ||
| Klein | [kləin] | |||
| KLEIO | - | Greek Mythology | ||
| KLEISTHENES | - | Ancient Greek | ||
| KLEITOS | - | Ancient Greek | ||
| KLEMEN | - | Slovene | ||
| KLEMENS | KLE-mens (German, Polish) | German, Danish, Swedish, Polish | ||
| KLEMENT | - | Czech, Slovak |