| Name | Meaning | Gender | Origin |
|---|
| Marge | Pearl | Female | Greek |
| Maria | Bitter | Female | Hebrew |
| Marley | Pleasant wood | Female | English |
| Marshall | Horse servant | Male | Germanic |
| Max | Little Maximus | Male | Latin |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maximus | The greatest | Male | Latin |
| Maya | Uncertain, perhaps mother or great one | Female | Greek |
| Mercy | Compassion | Female | English |
| Mickey | Who is like God? | Unisex | Hebrew |
| Mighty | | Unisex | Hebrew |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mitzi | Uncertain, maybe bitter | Unisex | Hebrew |
| Mollie | Uncertain, maybe bitter | Female | Hebrew |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Monica | Uncertain, perhaps counsellor | Female | Latin |
| 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 |
| Nadine | Hope | Female | Russian |
| Nala | Loved | Female | African |
| Nanette | Grace | Female | Hebrew |
| Nelson | Son of Neal | Male | English |
| Nikki | Victory of the people | Female | Greek |
| Nile | From The Nile | Female | Gaelic |
| Nina | Strong | Female | Latin |
| Ninja | | Unisex | Hebrew |
| Olga | Holy | Female | German |
| Onyx | A gemstone with bands of different colours. | Unisex | English |