| Name | Meaning | Gender | Origin |
|---|
| Malfoy | | Male | |
| Malkin | | Unisex | Hebrew |
| Marcus | warlike | Male | Latin |
| Marge | Pearl | Unisex | English |
| Marietta | Bitter | Female | Italian |
| Mary | bitter | Female | Hebrew |
| Maxime | The greatest.
| Male | |
| Michael | who is like God | Male | Hebrew |
| Miles | of smiles | Male | Latin |
| Millicent | after the character in D.C. Simpson's online comic Ozy and Millie | Female | |
| Mimsy | | Unisex | |
| Minerva | after the Roman goddess of the hunt | Female | Latin |
| Miranda | Admirable
| Female | Latin |
| Molly | Bitter
| Female | English |
| Moody | | Unisex | Hebrew |
| Morag | great | Female | Scottish |
| Muriel | myrrh; sea-bright; angel of June | Female | Irish |
| Myrtle | a flower, symbol of victory | Female | Greek |
| Narcissa | self-love | Female | Greek |
| Natalie | birthday of the Lord | Female | |
| Neville | from the new farmland | Male | |
| Newt | a small salamander | Male | English |
| Newton | new town | Male | English |
| Nicholas | victorious people | Male | Greek |
| Nick | Variation of Dominic, belonging to the Lord | Male | English |