| Name | Meaning | Gender | Origin |
|---|
| Lance | knight's attendant; land | Male | English |
| Lancelot | Knight of Arthur and lover of Guinevere
| Male | |
| Lastat | | Unisex | Hebrew |
| Laszlo | after the character in the movie Real Genius | Male | Hungarian |
| Latte | Expresso coffee mixed with steamed milk - a caf latte. | Male | |
| Lava | Moulton Earth | Unisex | English |
| Lazar | God Is My Helper | Unisex | Hungarian |
| Lefty | Left handed person. Member of the political left. | Unisex | |
| Legend | A romanticised story from earlier times. One who achieves legendary fame. | Male | English |
| Lego | | Unisex | |
| Legolas | Tolkien, Lord of the Rings | Unisex | |
| Leia | Weary | Unisex | Hebrew |
| Lemmy | after Lemmy Kilmister of Motorhead | Unisex | |
| Leo | Lion.
| Male | Latin |
| Leon | lion | Male | Greek |
| Lester | Fortified place.
| Male | English |
| Lewis | Renowned fighter. Form of Louis.
| Male | English |
| Lex | Protector Of Mankind | Male | English |
| Lickerish | | Unisex | Hebrew |
| Lightning | | Unisex | Hebrew |
| Linux | | Unisex | Hebrew |
| Lionel | Cousin of Lancelot
| Male | Latin |
| Lizard | | Unisex | Hebrew |
| Lobo | Wolf | Unisex | Italian |
| Locke | after the philosopher John Locke | Male | English |