| Kishal | One who is very youthful |
| Kithmal | A person who brings joy and harmony. |
| Kithmin | One who possesses a peaceful spirit. |
| Kithmina | A soul filled with inner tranquility. |
| Kithupa | A name of Tibetan origin meaning gift. |
| Kiyle | Narrow, a sound, a strait |
| Kjetil | Norse name, meaning ruler of the people |
| Kla Han | A name meaning a brave, bold warrior. |
| Klancy | A name meaning redhaired fighter. |
| Klark | A name meaning scholar or clerk. |
| Klein | German surname, meaning small or little |
| Kleiner | A surname meaning the small one. |
| Klementos | Derived from the word for merciful. |
| Kline | Derived from German, means 'slender' or 'tall' |
| Klinten | Derived from the word for a cliff. |
| Knoah | A variation meaning peaceful rest. |
| Knowlton | English surname, means 'knowing town' or 'wise settlement' |
| Knowshon | Derived from Hebrew, means 'God's gift' or 'gift from God' |
| Koba | Japanese name, means 'small, strong, and brave' |
| Kobey | A name meaning turtle or tortoise. |
| Koden | Japanese name, means 'small, strong, and brave' |
| Koeraad | One who gives bold, wise advice. |
| Kogon | Japanese name, means 'small, strong, and brave' |
| Kohlman | A person who sells charcoal. |
| Kohyar | A helpful and kind companion. |
| Koichi | Japanese name, means 'small, strong, and brave' |
| Koit | The first light of the dawn. |
| Kolbe | German name, means 'coal' or 'charcoal' |
| Komitha | It means a pleasant person. |
| Konradij | A bold and wise royal advisor. |
| Konradin | A brave and daring young ruler. |
| Koop | A merchant or a skilled trader. |
| Korben | Transferred use of the English surname |
| Korbob | A strong and resilient leader. |
| Korinthian | One who hails from the city Corinth. |
| Korrie | A name meaning from the hollow place. |
| Kostandin | Slavic name, means 'constant' or 'steadfast' |
| Kostyantyn | Slavic name, means 'constant' or 'steadfast' |
| Kouichi | The first son of happiness. |
| Kouki | Japanese name, means 'small, strong, and brave' |