| Name | Meaning | Gender | Origin |
|---|
| Lucy | Light | Female | Latin |
| Luna | Moon | Female | Latin |
| Lydia | Noble kind | Female | Germanic |
| Mac | Son of | Male | Gaelic |
| Maddy | Pet form of Mad- names | Female | English |
| Madge | Pearl | Female | Greek |
| Magda | Of Magdala | Female | Hebrew |
| Maggie | Pearl | Female | Greek |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |
| Majestic | | Unisex | Hebrew |
| Major | Greater | Male | Latin |
| Manley | Common clearing | Male | English |
| Mara | Bitter | Female | Hebrew |
| Max | Little Maximus | Male | Latin |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Mercy | Compassion | Female | English |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Mist | | Unisex | Hebrew |
| Misty | Misty | Female | English |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moonlight | | Unisex | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Murphy | Sea warrior | Male | Gaelic |
| Myra | Uncertain, perhaps myrrh, unguent | Female | Latin |
| Mystic | | Unisex | Hebrew |
| Nikki | Victory of the people | Female | Greek |
| Ninja | | Unisex | Hebrew |
| Nora | Light | Female | English |
| Nutmeg | | Unisex | Hebrew |