| Name | Meaning | Gender | Origin |
|---|
| Mather | Mower | Male | English |
| Max | Little Maximus | Male | Latin |
| Meg | Pearl | Female | Greek |
| Melvin | Uncertain, possibly bad town | Male | English |
| Mercer | Vendor of sewing materials | Male | French |
| Merlin | Sea fort | Male | Welsh |
| Mick | Who is like God? | Male | Hebrew |
| Mickey | Who is like God? | Unisex | Hebrew |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Murdock | Sea | Male | Gaelic |
| Murphy | Sea warrior | Male | Gaelic |
| Murray | Man of the sea | Male | Gaelic |
| Neil | Champion | Male | Gaelic |
| Nelson | Son of Neal | Male | English |
| Nevin | Sacred | Male | Gaelic |
| Newell | New town | Male | French |
| Newman | New man | Male | English |
| Newton | New settlement, new enclosure | Male | English |
| Nina | Strong | Female | Latin |
| Nolan | Chariot-fighter, champion | Male | Gaelic |
| Norton | North settlement, north enclosure | Male | English |
| Norwood | Norther woods | Male | English |
| Oakes | From The Oak | Male | English |
| Oakley | From the oak meadow | Male | English |
| Odell | Woad hill | Male | English |
| Ogden | Oak valley | Male | English |
| Orrin | Little green one | Male | Gaelic |
| Oscar | Divine spear | Male | English |