| Name | Meaning | Gender | Origin |
|---|
| Karma | Fate or destiny (Hinduism and Buddhism) | Female | Hindi |
| Kayleigh | Slender | Unisex | English |
| Keelyn | Lively: aggressive. Variant of Kelly.
| Female | |
| Keiko | Japanese for happy or beloved | Female | Japanese |
| Kennedy | misshapen head | Female | Irish |
| Kiana | Variant of Kian. Ancient.
| Female | Modern |
| Kismet | fate, destiny | Female | Word |
| Koko | stork | Female | Japanese |
| Kylie | Boomerang. Feminine form of Kyle.
| Female | Aboriginal |
| Laurel | Laurel
| Female | Latin |
| Laurel And Hardy | | Unisex | Hebrew |
| Lioness | | Female | |
| Lisa | Devoted to God
| Female | English |
| Liza | Diminutive of Elizabeth, Hebrew, pledged to God | Female | English |
| Lorelei | from the Rhine River | Female | |
| Luciana | light | Female | Italian |
| Lucila | | Unisex | |
| Lucrecia | Brings light
| Female | |
| Lula | Abundant | Female | English |
| Lulu | Pet form of the names Louise or Louella.
| Female | English |
| Lumpy | | Unisex | Hebrew |
| Luna Lovegood | Ravenclaw student.
| Female | |
| Lyra | lyre | Female | Greek |
| Madame Malkin | Owns robe shop.
| Female | |
| Madeleine | From the tower
| Female | |