| Name | Meaning | Gender | Origin |
|---|
| Kat | Pure | Female | Greek |
| Kate | Pure | Female | Greek |
| Katharine | Pure | Female | Greek |
| Katherine | Pure | Female | Greek |
| Kathy | Pure | Female | Greek |
| Katie | Pure | Female | Greek |
| Keira | Dark | Female | Gaelic |
| Kelly | War | Female | Gaelic |
| Kolton | Coal Town. | Unisex | English |
| Ladislav | Glorious rule | Male | Slavonic |
| Lance | Territory | Male | German |
| Laurence | Man from Laurentum | Male | Latin |
| Leo | Lion | Male | Latin |
| Lex | Defending men | Unisex | Greek |
| Lexie | Defending men | Female | Greek |
| Lia | Uncertain, possibly from Rosalia | Female | Italian |
| Liam | Will, desire and helmet, protection | Male | Germanic |
| Liliana | Lilies | Female | Latin |
| Lindsay | Uncertain, perhaps dark lake | Female | Gaelic |
| Liz | My God is a vow | Female | Hebrew |
| Lizzie | My God is a vow | Unisex | Hebrew |
| Logan | Hollow | Unisex | Gaelic |
| Lottie | Free man | Female | German |
| Lou | Fame and war | Male | Germanic |
| Louis | Fame and war | Male | Germanic |
| Luana | Combination of Lou and Ann | Female | English |
| Luc | Man from Lucania | Male | Greek |
| Lucas | Man from Lucania | Male | Greek |
| Ludwig | Fame and war | Male | Germanic |
| Lyn | "A Cascade."Variants Include Lynn, Linn, Lynna, And Lynne. | Female | English |