| Name | Meaning | Gender | Origin |
|---|
| Malakai | My messenger | Male | Hebrew |
| Mara | Bitter | Female | Hebrew |
| Marcha | Brave warrior, warlike | Both | Latin |
| Marcia | From the god Mars | Female | Latin |
| Mariska | Uncertain, maybe bitter | Female | Hebrew |
| Marlee | Contraction of Maria Magdalene | Female | German |
| Marli | From The Name Marilyn | Female | English |
| Maverick | Dissenter | Unisex | English |
| Max | Little Maximus | Male | Latin |
| Maya | Uncertain, perhaps mother or great one | Female | Greek |
| Mayhem | | Unisex | Hebrew |
| Meeko | | Unisex | Hebrew |
| Mia | Uncertain, maybe bitter | Female | Hebrew |
| Mickey | Who is like God? | Unisex | Hebrew |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Mika | Beautiful smell | Female | Japanese |
| Mina | Will, desire + helmet, protection | Female | Germanic |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mitsu | Bear | Unisex | Native American |
| Mollie | Uncertain, maybe bitter | Female | Hebrew |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moon | Letters | Female | Korean |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Moss | Drawn out of the water | Male | Hebrew |
| Mozart | | Unisex | Hebrew |
| Mukluk | A soft boot worn by Eskimos, often lined with fur and usually made of sealskin or reindeer skin | Both | English |
| Murphy | Sea warrior | Male | Gaelic |
| Mya | Uncertain, perhaps mother or great one | Female | Greek |
| Nadia | Hope | Female | Russian |