| Name | Meaning | Gender | Origin |
|---|
| Matilda | Powerful battler | Female | Germanic |
| Melanie | Black | Female | Greek |
| Mercedes | Mercies | Female | Spanish |
| Mercy | Compassion | Female | English |
| Mickey | Who is like God? | Unisex | Hebrew |
| Micro | | Unisex | Hebrew |
| Miette | Small Sweet Thing | Female | French |
| Miki | Beautiful story | Female | Japanese |
| Mimi | Uncertain, maybe bitter | Female | Hebrew |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Mischief | One that causes minor trouble or disturbances | Unisex | English |
| Missy | Bee | Female | Greek |
| Mitzi | Uncertain, maybe bitter | Unisex | Hebrew |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Mora | Peacock | Female | Sanskrit |
| Morgan | Uncertain, perhaps bright sea | Female | Welsh |
| Morsel | | Unisex | Hebrew |
| Mosquito | | Unisex | Hebrew |
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | English |
| Moxie | Ability to face difficulty with courage. | Unisex | English |
| Muffin | A small cup shaped cake | Unisex | English |
| Munchkin | A very small elflike person. | Unisex | English |
| Natalia | Christ's birthday | Female | Italian |
| Nibbles | | Unisex | Hebrew |
| Nike | Victory | Female | Greek |
| Nikki | Victory of the people | Female | Greek |
| Nina | Strong | Female | Latin |
| Ninja | | Unisex | Hebrew |
| Nipper | A small boy | Unisex | English |
| Nola | Fair shoulder, white shoulder | Female | Gaelic |