| Name | Meaning | Gender | Origin |
|---|
| Luna | Moon | Female | Latin |
| Mac | Son of | Male | Gaelic |
| Macy | Place of Maccius | Male | English |
| Maddie | Pet form of Mad- names | Unisex | English |
| Madison | Son of Maud | Unisex | English |
| Maggie | Pearl | Female | Greek |
| Marley | Pleasant wood | Female | English |
| Marnie | Pet form of Marna | Female | English |
| Martin | From the god Mars | Male | Latin |
| Maverick | Dissenter | Unisex | English |
| Max | Little Maximus | Male | Latin |
| Maya | Uncertain, perhaps mother or great one | Female | Greek |
| Mia | Uncertain, maybe bitter | Female | Hebrew |
| Mickey | Who is like God? | Unisex | Hebrew |
| Millie | Labour | Female | Germanic |
| Milo | Uncertain, perhaps peaceful | Male | Germanic |
| Mimi | Uncertain, maybe bitter | Female | Hebrew |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Missy | Bee | Female | Greek |
| Mocha | Coffee of high quality. | Unisex | English |
| Mojo | Good luck charm. | Unisex | English |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Muffin | A small cup shaped cake | Unisex | English |
| Murphy | Sea warrior | Male | Gaelic |
| Nala | Loved | Female | African |
| Nike | Victory | Female | Greek |
| Nikki | Victory of the people | Female | Greek |
| Nina | Strong | Female | Latin |
| Nova | New | Female | Latin |