| Name | Meaning | Gender | Origin |
|---|
| Kane | tribute, warrior; the doubly-accomplished, golden; man, the eastern sky; beautiful | Male | Celtic |
| Kayleigh | Slender | Unisex | English |
| Keith | wood, wind; wood-dweller | Male | Scottish |
| Kelli | From The Wood | Unisex | Welsh |
| Kimble | | Male | |
| Kincaid | | Unisex | Hebrew |
| Knight | Noble, Soldier | Male | English |
| Lace | From Lassy, Normandy | Unisex | English |
| Lance | knight's attendant; land | Male | English |
| Lancelot | Knight of Arthur and lover of Guinevere
| Male | |
| Larsen | | Unisex | |
| Lawson | son of Lawrence | Male | English |
| Lew | Refuge | Unisex | |
| Lewie | | Unisex | |
| Lewis | Renowned fighter. Form of Louis.
| Male | English |
| Lou | Famous Warrior | Male | English |
| Louie | renowned warrier | Male | English |
| Louis | famed warrior | Male | |
| Ludwig | Famous fighter
| Male | |
| Luigi | Famous fighter
| Male | Italian |
| Luis | Famous fighter
| Male | |
| Luther | Renowned warrior.
| Male | |
| Major | Army or Air Force rank above Captain but below Lieutenant Colonel | Male | Latin |
| Marabunta | after the Soldier ants in South America | Unisex | |
| Marcel | little hammer | Male | |