| Name | Meaning | Gender | Origin |
|---|
| Julie | Youthful: Jove's child. A feminine of Julian.
| Female | |
| Kate | Pure | Female | English |
| Katherine | Pure. Used since third century A.D. Early Latin forms Katerina and Caterina became Katharine and Catherine. French Cateline and English Catlyn came into wider use during medieval period when variants multiplied.
| Female | Greek |
| Katie | Variant of Katherine. Pure.
| Female | English |
| Katy | pure | Female | Short |
| Katy | pure | Female | Short |
| Kayla | crown of laurels | Female | Arabic |
| Kaylee | Arabic and Hebrew, laurel, crown | Female | American |
| Kelly | Lively: aggressive.
| Female | Irish |
| Lana | Attractive | Female | English |
| Lara | citadel | Female | Russian |
| Laura | bay laurel | Female | Latin |
| Leah | cow, weary one; glad tidings; mistress, ruler | Female | Hebrew |
| Liam | Form of William.
| Male | Irish |
| Lila | night | Female | Arabic |
| Lilly | Lily | Female | English |
| Lily | Lily
| Female | English |
| Lina | tender | Unisex | |
| Linda | pretty | Female | |
| Linus | flaxen-haired | Male | Greek |
| Lisa | Devoted to God
| Female | English |
| Logan | little hollow | Male | Scottish |
| Lola | strong woman | Female | Spanish |
| Louise | Renowned fighter. Feminine of Louis.
| Female | |
| LouLou | | Unisex | Hebrew |