| Name | Meaning | Gender | Origin |
|---|
| 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 |
| Liberty | Free
| Female | Word |
| Lois | Battle Maiden | Female | Greek |
| Lou | Famous Warrior | Male | English |
| Louie | renowned warrier | Male | English |
| Louis | famed warrior | Male | |
| Louise | Renowned fighter. Feminine of Louis.
| Female | |
| Ludwig | Famous fighter
| Male | |
| Luella | Famous elf
| Female | Spelling |
| Luigi | Famous fighter
| Male | Italian |
| Luis | Famous fighter
| Male | |
| Luisa | Spanish form of Louise famous in war
| Female | Italian |
| Luther | Renowned warrior.
| Male | |
| Macy | from Matthew's land; club | Female | English |
| Major | Army or Air Force rank above Captain but below Lieutenant Colonel | Male | Latin |