| Name | Meaning | Gender | Origin |
|---|
| Mercedes | Compassionate, merciful. | Female | Spanish |
| Merry | Mirthful: joyous. Also an abbreviation of Meredith.
| Female | English |
| Midas | | Unisex | Hebrew |
| Midget | A small or miniature version | Unisex | |
| Mika | Abbreviation of Michaela:Micaela: Mikaela: Mikayla: Mychaela: Mikella. Feminine of Michael gift from God.
| Female | Japanese |
| Milagritos | Miracle
| Female | |
| Milagrosa | Miracle
| Female | |
| Min | quick | Female | Chinese |
| Mina | Precious Stone | Female | Hindi |
| Mitzi | bitter | Female | |
| Modeste | Modest
| Female | |
| Mojo | Good luck charm. | Unisex | |
| Moon | Moon | Female | American |
| Moppet | A young child. | Unisex | |
| Morgana | sea-circle | Female | Female |
| Mork And Mindy | | Unisex | Hebrew |
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | |
| Moxie | Ability to face difficulty with courage. | Female | English |
| Mr Cookie | | Female | |
| Muffin | A small cup shaped cake | Unisex | |
| Muirgheal | Knows the sea
| Female | |
| Munchkin | A very small elflike person. | Unisex | |
| Neela | sapphire blue | Female | Hindi |
| Neferkitty | | Unisex | Hebrew |
| Neutron | | Unisex | Hebrew |