| Name | Meaning | Gender | Origin |
|---|
| Marcus | From the god Mars | Male | Latin |
| Mark | From the god Mars | Male | Latin |
| Marshall | Horse servant | Male | Germanic |
| Martin | From the god Mars | Male | Latin |
| Marty | From the god Mars | Male | Latin |
| Marvin | Uncertain, possibly eminent marrow | Male | Welsh |
| Maryjane | Combination of Mary and Jane | Unisex | English |
| Mason | Bricklayer | Male | French |
| Matt | Gift of God | Male | Hebrew |
| Maverick | Dissenter | Unisex | English |
| Maxwell | Maccus's stream | Male | English |
| Mel | Uncertain, possibly bad town | Unisex | English |
| Merrick | Moor | Male | Welsh |
| Miles | Uncertain, perhaps peaceful | Male | Germanic |
| Milo | Uncertain, perhaps peaceful | Male | Germanic |
| Milton | Settlement by the mill | Male | English |
| Moe | Moor | Male | Latin |
| Montana | Mountainous | Unisex | Latin |
| Monte | Gomeric's hill | Male | French |
| Monty | Gomeric's hill | Male | French |
| Morris | Moor | Male | Latin |
| Morton | Settlement by or on a moor | Male | English |
| Murdock | Sea | Male | Gaelic |
| Nash | At the ash tree | Male | English |
| Neal | Champion | Male | Gaelic |
| Ned | Wealth protector | Unisex | English |
| Neil | Champion | Male | Gaelic |
| Nelson | Son of Neal | Male | English |
| Nick | Victory of the people | Male | Greek |
| Oakley | From the oak meadow | Male | English |