| Name | Meaning | Gender | Origin |
|---|
| Marigold | Golden Mary | Female | English |
| Marilyn | Uncertain, maybe bitter | Female | Hebrew |
| Marty | From the god Mars | Male | Latin |
| Max | Little Maximus | Male | Latin |
| Maxie | Pet form of names starting with Max | Unisex | English |
| Maxwell | Maccus's stream | Male | English |
| Mayer | Clever | Male | Hebrew |
| Melvin | Uncertain, possibly bad town | Male | English |
| Mickey | Who is like God? | Unisex | Hebrew |
| Mikaela | Who is like God? | Female | Hebrew |
| Miles | Uncertain, perhaps peaceful | Male | Germanic |
| Millie | Labour | Female | Germanic |
| Mindy | Pet form of Melinda | Female | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mitzi | Uncertain, maybe bitter | Unisex | Hebrew |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moony | | Unisex | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Moxie | Ability to face difficulty with courage. | Unisex | English |
| Moya | Exceptional | Female | English |
| Munchkin | A very small elflike person. | Unisex | English |
| Murphy | Sea warrior | Male | Gaelic |
| Myrtle | Myrtle | Female | English |
| Neville | New town | Male | French |
| Newlyn | From The New Spring | Male | English |
| Nick | Victory of the people | Male | Greek |
| Nicola | Victory of the people | Female | Greek |
| Nina | Strong | Female | Latin |