| Name | Meaning | Gender | Origin |
|---|
| Leroy | The king.
| Male | |
| Leslie | dweller in the gray castle; small meadow | Female | Scottish |
| Lester | Fortified place.
| Male | English |
| Lilly | Lily | Female | English |
| Lincoln | Capital of Nebraska, USA. Old English: home by the pond | Male | English |
| Lindsay | pool island; linden island | Female | English |
| Locke | after the philosopher John Locke | Male | English |
| London | fierce ruler of the world | Female | English |
| Louis | famed warrior | Male | |
| Love | loved one | Female | Word |
| Lowell | Beloved | Male | |
| Lucille | light | Female | |
| Luella | Famous elf
| Female | Spelling |
| Luke | Light | Male | Greek |
| Luna | moon | Female | Latin |
| Mabel | my fair maid; lovely | Female | English |
| Maddox | Beneficient | Male | Welsh |
| Madeleine | From the tower
| Female | |
| Madison | son of a mighty warrior; son of Maud | Female | English |
| Malcolm | Royal Blood | Male | Scottish |
| Manhattan | Whiskey | Unisex | |
| Marat | | Unisex | Hebrew |
| Marcus | warlike | Male | Latin |
| Margaret | after Margaret Thatcher | Female | Greek |
| Margaux | Pearl | Female | English |