| KONSTANTIN | - | Russian Name | Konstantin | - | Latin Name |
| Konstantin-Mihailo | - | Serbian Name | Kontar | - | Egyptian Name |
| Koofrey | - | African Name | Kooper | - | English Name |
| Koora | - | Aborigin Name | Koorong | - | Aborigin Name |
| Kopecky | - | Czechoslovakian Name | Kopel | - | Yiddish Name |
| Kopke | - | Yiddish Name | Koppel | - | Yiddish Name |
| Koppele | - | Yiddish Name | Koqik | - | Eskimo Name |
| Korah | - | Biblical Name | Koral | - | Turkish Name |
| Koray | - | Turkish Name | Korban | - | Hebrew Name |
| Korben | - | Gaelic Name | Korbin | - | United States Name |
| Korcan | - | Turkish Name | Kord | - | Polish Name |
| Kore | - | Assyrian Name | Korey | - | Irish Name |
| Korfa | - | African Name | Korhan | - | Turkish Name |
| Kori | - | Norse Name | Korian | - | Armenian Name |
| Korkut | - | Turkish Name | Kormákur | - | Icelandic Name |
| Korneli | - | Basque Name | Korniy | - | Ukrainian Name |
| Kornkanok | - | Thai Name | Kort | - | German Name |
| Kory | - | United States Name | Kosar | - | Assyrian Name |
| Kosey | - | African Name | Koshin | - | Hindu Name |
| Kosta | - | Cyprien Name | Kosta-Nikola | - | Serbian Name |
| Kostantinos | - | Assyrian Name | KOSTYA | - | Russian Name |
| Kostyantyn | - | Ukrainian Name | Kosumi | - | American Name |
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