| Name | Meaning | Gender | Origin |
|---|
| Mighty | | Unisex | Hebrew |
| Mina | Will, desire + helmet, protection | Female | Germanic |
| Mini | Something smaller than others of its type | Unisex | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Miranda | She who must be admired | Female | Latin |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mitzi | Uncertain, maybe bitter | Unisex | Hebrew |
| Mocha | Coffee of high quality. | Unisex | English |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moondust | | Unisex | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Moxie | Ability to face difficulty with courage. | Unisex | English |
| Mozart | | Unisex | Hebrew |
| Mufasa | From The Lion King | Unisex | English |
| Muffin | A small cup shaped cake | Unisex | English |
| Muffy | | Unisex | Hebrew |
| Munchkin | A very small elflike person. | Unisex | English |
| Myra | Uncertain, perhaps myrrh, unguent | Female | Latin |
| Mystic | | Unisex | Hebrew |
| Natasha | (Christ's) birthday | Female | Latin |
| Nell | Abbreviation Of Eleanor Shining Light. | Female | English |
| Neptune | God of the sea | Unisex | Latin |
| Neutron | | Unisex | Hebrew |
| Neva | Radiance | Female | Gaelic |
| Nevada | Snow-covered | Female | Spanish |
| Newt | New settlement, new enclosure | Unisex | English |
| Nibbler | | Unisex | Hebrew |
| Nibbles | | Unisex | Hebrew |
| Nicky | Victory of the people | Unisex | Greek |