| Name | Meaning | Gender | Origin |
|---|
| Lilly | Lily | Female | English |
| Lily | Lily | Female | English |
| Lotus | Flowery | Female | Greek |
| Luna | Moon | Female | Latin |
| Lyra | Lyre | Female | Greek |
| Madison | Son of Maud | Unisex | English |
| Maggie | Pearl | Female | Greek |
| Magnolia | Magnol's flower | Female | Latin |
| Mahogany | American evergreen tree valued for its hard, red-brown wood | Female | English |
| Mango | After the character in Saturday Night Live | Unisex | English |
| Marigold | Golden Mary | Female | English |
| Marina | From the god Mars | Female | Latin |
| Meadow | A meadow | Female | English |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Mist | | Unisex | Hebrew |
| Misty | Misty | Female | English |
| Montana | Mountainous | Unisex | Latin |
| Moon | Letters | Female | Korean |
| Moonlight | | Unisex | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | English |
| Myrtle | Myrtle | Female | English |
| Naia | Flowing/Blossom | Female | English |
| Neva | Radiance | Female | Gaelic |
| Nevada | Snow-covered | Female | Spanish |
| Norma | Thor mind, Thor courage | Female | Gaelic |
| Nova | New | Female | Latin |
| Nutmeg | | Unisex | Hebrew |
| Ocean | Ocean | Female | Greek |
| Olive | Olive | Female | English |