| Name | Meaning | Gender | Origin |
|---|
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kitty | Variant of Katherine. Pure.
| Female | English |
| Kizzy | From Roots | Female | English |
| Klaus | Scandinavian and German variation of Nicolas | Male | |
| Klondike | | Male | Hebrew |
| Koda | | Male | |
| Koko | stork | Female | Japanese |
| Lace | From Lassy, Normandy | Unisex | English |
| Lady | A female title of nobility. | Female | |
| Lancelot | Knight of Arthur and lover of Guinevere
| Male | |
| Lapis | Jewel | Female | Egyptian |
| Lemon | | Unisex | Hebrew |
| Lena | Alluring, Temptress, Light | Female | Greek |
| Leo | Lion.
| Male | Latin |
| Lestat | | Unisex | Hebrew |
| Levi | United | Male | Hebrew |
| Lexi | Greek, feminine form of Alexander, defending men | Female | English |
| Licorice | Confection made from the licorice root. | Unisex | |
| Licorice Drop | | Unisex | |
| Lightning | | Unisex | Hebrew |
| Lil | English from Latin, lily, a flower | Female | English |
| Lil | English from Latin, lily, a flower | Female | English |
| Lilac | Bluish Purple | Female | Latin |
| Lilly | Lily | Female | English |
| Lily | Lily
| Female | English |