| Kjell | | SHEL | Swedish, Norwegian | |
| Kjellfrid | | - | Norwegian | |
| Kjersti | | - | Norwegian | |
| Kjerstin | | SHESH-tin (Swedish) | Norwegian, Swedish | |
| Kjetil | | - | Norwegian | |
| Klara | | KLAH-rah (German, Russian, Polish) | Swedish, Norwegian, Danish, Icelandic, German, Russian, Ukrainian, Polish, Slovene, Croatian | |
| Klaus | | KLOWS (German, Finnish) | German, Danish, Norwegian, Finnish | |
| Knut | | KNOOT (German) | Swedish, Norwegian, Danish, German | |
| Knute | | - | Norwegian | |
| Konrad | | KAWN-raht (German, Polish) | German, Swedish, Norwegian, Danish, Polish, Slovene | |
| Kristen (1) | | - | Danish, Norwegian | |
| Kristian | | KREES-tyahn (Swedish), KREES-tee-ahn (Finnish) | Swedish, Norwegian, Danish, Finnish | |
| Kristin | | kris-TEEN (Swedish, German), KRIS-tin (English) | Swedish, Norwegian, Danish, German, English | |
| Kristina | | kris-TEE-nah (German) | Swedish, Norwegian, Danish, Russian, German, Slovene, Czech, Lithuanian, Serbian, Croatian, Faroese, | |
| Kristine | | kris-TEEN (English), kris-TEE-nə (German) | Norwegian, Danish, Swedish, English, German | |