| Name | Meaning | Gender | Origin |
|---|
| Margaret | after Margaret Thatcher | Female | Greek |
| Margarita | Cocktail made with tequila and lemon or lime juice. | Female | Spanish |
| Mariah | the Lord is my teacher | Female | Latin |
| Marzipan | from the Flash cartoon Homestar Runner | Unisex | |
| Mau | | Unisex | |
| Mavise | Joy
| Female | |
| Maya | Abbreviation of Amalia: variant of Maia.
| Female | Hebrew |
| Maynard | Firm
| Male | |
| Meadow | Meadow | Female | English |
| Megaton | | Male | |
| Mercedes | Compassionate, merciful. | Female | Spanish |
| Michiko | She was the first commoner to become Emperess of Japan.
| Female | Japanese |
| Mikeal | | Male | |
| Milky | | Female | |
| Millie | English, gentle strength | Female | English |
| Ming | shining bright | Male | Chinese |
| Miranda Goshawk | Author of The Standard book of Spells, Grade 2.
| Female | |
| Misja | I think that it means little bear, Little fighter or something like that
| Female | |
| Modesta | Modest
| Female | |
| Molly | Bitter
| Female | English |
| Mona Lisa | | Unisex | |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Montague | steep mountain | Male | |
| Montego | Mountainous | Male | Spanish |