| Name | Meaning | Gender | Origin |
|---|
| Lassie | Young girl | Female | English |
| Lemon | Beloved man | Unisex | English |
| Lexi | Defending men | Female | Greek |
| Lexie | Defending men | Female | Greek |
| Licorice | Confection made from the licorice root. | Unisex | English |
| Lilly | Lily | Female | English |
| Lily | Lily | Female | English |
| Lola | Sorrows | Female | Spanish |
| Lovely | | Unisex | Hebrew |
| Lucky | Fortunate | Unisex | English |
| Lucy | Light | Female | Latin |
| Luna | Moon | Female | Latin |
| Mackenzie | Son of Coinneach | Male | Gaelic |
| Macy | Place of Maccius | Male | English |
| Maddie | Pet form of Mad- names | Unisex | English |
| Madison | Son of Maud | Unisex | English |
| Madonna | My lady | Female | Italian |
| Mae | The fifth month of the year | Female | English |
| Magenta | A vivid purplish red colour | Unisex | English |
| Maggie | Pearl | Female | Greek |
| Malibu | Noisy Surf | Unisex | Native American |
| Mallory | Luckless | Female | French |
| Mandy | She who must be loved | Female | Latin |
| Mango | After the character in Saturday Night Live | Unisex | English |
| Marigold | Golden Mary | Female | English |
| Marilyn | Uncertain, maybe bitter | Female | Hebrew |
| Marley | Pleasant wood | Female | English |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maya | Uncertain, perhaps mother or great one | Female | Greek |
| Melody | Melody | Female | Greek |