| Name | Meaning | Gender | Origin |
|---|
| Mattie | Mighty In Battle | Unisex | German |
| Matty | Gift Of G-D | Unisex | Hebrew |
| Maud | strength in battle | Female | English |
| Maude | battle-mighty | Female | English |
| Mavise | Joy
| Female | |
| Mazzy | | Unisex | |
| Medwin | Strong Friend | Unisex | English |
| Megan | mighty, strong able, pearl | Female | English |
| Mei Mei | Means little sister in Chinese
| Female | |
| Mendi | Reference to the Virgin Mary
| Female | |
| Mercedes | Compassionate, merciful. | Female | Spanish |
| Metro | | Unisex | Hebrew |
| Mika | Abbreviation of Michaela:Micaela: Mikaela: Mikayla: Mychaela: Mikella. Feminine of Michael gift from God.
| Female | Japanese |
| Mila | Dear One | Female | Russian |
| Millicent | after the character in D.C. Simpson's online comic Ozy and Millie | Female | |
| Mimi | Form of Williamina
| Female | English |
| Mimi | Form of Williamina
| Female | English |
| Min | quick | Female | Chinese |
| Mina | Precious Stone | Female | Hindi |
| Miriam | bitter | Female | Hebrew |
| Moon | Moon | Female | American |
| Morakot | | Unisex | |
| Morticia | Addams family | Female | |
| Nafisa | | Female | |
| Naomi | pleasent one; above all, beauty | Female | Hebrew |