| Name | Meaning | Gender | Origin |
|---|
| Mittens | | Unisex | Hebrew |
| Mocha | Coffee of high quality. | Unisex | English |
| Moe | Moor | Male | Latin |
| Mojo | Good luck charm. | Unisex | English |
| Monet | Solitary | Unisex | French |
| Monty | Gomeric's hill | Male | French |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | English |
| Mozart | | Unisex | Hebrew |
| Muffin | A small cup shaped cake | Unisex | English |
| Murphy | Sea warrior | Male | Gaelic |
| Mutley | | Unisex | Hebrew |
| Nana | Grace | Unisex | Hebrew |
| Napoleon | Sons of the mist, a race of dwarves | Male | Germanic |
| Nelson | Son of Neal | Male | English |
| Nemo | No one | Male | Latin |
| Neo | New | Male | English |
| Nepeta | | Unisex | Hebrew |
| Neptune | God of the sea | Unisex | Latin |
| Nero | Stern | Male | Latin |
| Nestor | Wise | Male | Greek |
| Newt | New settlement, new enclosure | Unisex | English |
| Newton | New settlement, new enclosure | Male | English |
| Nibbles | | Unisex | Hebrew |
| Nicky | Victory of the people | Unisex | Greek |
| Nigel | Champion From The Irish And Scottish Niall. | Male | Gaelic |
| Niko | Victory of the people | Male | Greek |
| Niles | People's Victory | Male | Gaelic |
| Ninja | | Unisex | Hebrew |
| Nipper | A small boy | Unisex | English |