| Name | Meaning | Gender | Origin |
|---|
| Max | Large spring | Male | English |
| Maxwell | Capable
| Male | Scottish |
| Maya | Abbreviation of Amalia: variant of Maia.
| Female | Hebrew |
| Medea | ruling; middle child | Female | Greek |
| Mel | Scottish, settlement on infertile land | Male | English |
| Mela | religious gathering | Female | Hindi |
| Melody | song | Female | Greek |
| Meowth | | Unisex | |
| Meredith | great ruler | Female | Welsh |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Merrick | ruler of the sea | Male | Anglo-Welsh |
| Mesha | ram, born under the sign of Aries | Unisex | |
| Miaow | | Unisex | |
| Michael | who is like God | Male | Hebrew |
| Micheal | Who Is Like God | Unisex | Irish |
| Midnight | Intense darkness, the middle of the night | Male | English |
| Miko | | Unisex | |
| Miles | of smiles | Male | Latin |
| Milly | Highborn Power | Unisex | English |
| Milly | Highborn Power | Unisex | English |
| Mimsy | | Unisex | |
| Minerva | after the Roman goddess of the hunt | Female | Latin |
| Minimog | | Unisex | Hebrew |
| Minty | Collector Of Thoughts, Determined Protector | Unisex | French |
| Mistress | | Unisex | Hebrew |