| Name | Meaning | Gender | Origin |
|---|
| Mattie | Mighty In Battle | Unisex | German |
| May | bitter | Female | English |
| Meaghan | Pearl | Unisex | English |
| Meg | Pearl | Female | English |
| Megan | mighty, strong able, pearl | Female | English |
| Meggie | Pearl | Unisex | English |
| Meghann | Pearl | Unisex | Greek |
| Melanie | Dark.
| Female | Greek |
| Mercury | Trade God | Male | Latin |
| Meta | Ambitious | Unisex | Latin |
| Mica | Humble | Unisex | Hebrew |
| Micah | who is like the Lord | Male | Hebrew |
| Midge | Gnat like flies found near swamps. A little person | Female | English |
| Miller | one who mills. Brand of American beer | Male | English |
| Millie | English, gentle strength | Female | English |
| Minnie | Form of Williamina
| Female | English |
| Molly | Bitter
| Female | English |
| Mona | Gathered of the seed of a jimson weed
| Female | Irish |
| Monte | Powerful Mountain | Male | English |
| Moonstone | | Unisex | |
| Nell | Abbreviation of Eleanor shining light.
| Female | English |
| Nelly | Abbreviation of Eleanor shining light.
| Male | English |
| Neptune | | Male | |
| Nickel | | Unisex | Hebrew |
| Noire | | Unisex | |