| Name | Meaning | Gender | Origin |
|---|
| Mercedes | Mercies | Female | Spanish |
| Mercia | Border people | Female | English |
| Meryl | Bright as the sea | Unisex | Gaelic |
| Mia | Uncertain, maybe bitter | Female | Hebrew |
| Millie | Labour | Female | Germanic |
| Mimi | Uncertain, maybe bitter | Female | Hebrew |
| Mini | Something smaller than others of its type | Unisex | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Minx | | Unisex | Hebrew |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mocha | Coffee of high quality. | Unisex | English |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moondancer | | Unisex | Hebrew |
| Morgan | Uncertain, perhaps bright sea | Female | Welsh |
| 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 |
| Mystic | | Unisex | Hebrew |
| Nala | Loved | Female | African |
| Naomi | Beautiful, pleasant, delightful | Female | Hebrew |
| Narcissus | Sleep | Male | Greek |
| Nell | Abbreviation Of Eleanor Shining Light. | Female | English |
| Nellie | Abbreviation Of Eleanor Shining Light. | Female | English |
| Nerissa | Sea sprite | Female | Greek |
| Nessa | From The Headland | Female | English |
| Nibbles | | Unisex | Hebrew |
| Nikita | Unconquered, unconquerable | Female | Greek |
| Nikki | Victory of the people | Female | Greek |
| Nina | Strong | Female | Latin |