| Name | Meaning | Gender | Origin |
|---|
| Marilyn | bitter | Female | English |
| Marley | From the lake in the meadow | Female | English |
| Marley | From the lake in the meadow | Female | English |
| Marmalade | | Unisex | |
| Mars | God Of War | Male | Latin |
| Marshmallow | A soft spongy sweet confectionery. Also a timid person. | Unisex | |
| Matilda | battle-mighty | Female | |
| Max | Large spring | Male | English |
| Max | Large spring | Male | English |
| Maya | Abbreviation of Amalia: variant of Maia.
| Female | Hebrew |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Merry | Mirthful: joyous. Also an abbreviation of Meredith.
| Female | English |
| Mia | Mine | Female | Scandinavian |
| Mickey | Abbreviation of Michael and Micah Who is like God?
| Male | English |
| Midnight | Intense darkness, the middle of the night | Male | English |
| Midnite | | Unisex | |
| Mika | Abbreviation of Michaela:Micaela: Mikaela: Mikayla: Mychaela: Mikella. Feminine of Michael gift from God.
| Female | Japanese |
| Miles | of smiles | Male | Latin |
| Miley | A Soldier, Merciful | Female | Latin |
| Millie | English, gentle strength | Female | English |
| Milly | Highborn Power | Unisex | English |
| Milly | Highborn Power | Unisex | English |
| Milo | Merciful.
| Male | Latinized |
| Milo | Merciful.
| Male | Latinized |
| Mimi | Form of Williamina
| Female | English |