| Kolman | | KAWL-mahn | German (Rare) | |
| Koloman | | KO-lo-mahn (German) | German (Rare), Slovak | |
| Konrad | | KAWN-raht (German, Polish) | German, Swedish, Norwegian, Danish, Polish, Slovene | |
| Konstantin | | KAWN-stahn-teen (German), kahn-stahn-TEEN (Russian) | German, Hungarian, Russian, Serbian, Bulgarian, Macedonian | |
| Konstanze | | - | German | |
| Kora | | KO-rah | German | |
| Korbinian | | kawr-BEE-nee-ahn | German | |
| Kord | | KAWRT | German | |
| Kornelia | | kawr-NE-lee-ah (German), kawr-NEL-yah (Polish) | German, Polish | |
| Kreszentia | | - | German | |
| Kreszenz | | - | German | |
| Kriemhild | | KREEM-hilt (German) | German, Germanic Mythology | |
| Kriemhilde | | kreem-HIL-də | German | |
| Krimhilde | | krim-HIL-də | German | |
| Krista | | KRIS-tah (German), KRIS-tə (English), KREES-tah (Finnish) | German, English, Finnish | |