| Name | Meaning | Gender | Origin |
|---|
| Magnum | A large type of wine bottle. | Unisex | English |
| Major | Greater | Male | Latin |
| Malcolm | Columba's servant | Male | Gaelic |
| Marble | | Unisex | Hebrew |
| Marley | Pleasant wood | Female | English |
| Marshall | Horse servant | Male | Germanic |
| Maverick | Dissenter | Unisex | English |
| Max | Little Maximus | Male | Latin |
| Maximus | The greatest | Male | Latin |
| Maynard | Mighty and brave | Male | Germanic |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Miles | Uncertain, perhaps peaceful | Male | Germanic |
| Mocha | Coffee of high quality. | Unisex | English |
| Montana | Mountainous | Unisex | Latin |
| 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 |
| Mozart | | Unisex | Hebrew |
| Neo | New | Male | English |
| Nero | Stern | Male | Latin |
| Newton | New settlement, new enclosure | Male | English |
| Nike | Victory | Female | Greek |
| Ninja | | Unisex | Hebrew |
| Nipper | A small boy | Unisex | English |
| Nugget | As in Chicken | Unisex | English |
| Nutmeg | | Unisex | Hebrew |
| Nyx | Night | Female | Greek |
| Oliver | Elf army | Male | French |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Oscar | Divine spear | Male | English |
| Otis | One who hears well | Male | Greek |