| Name | Meaning | Gender | Origin |
|---|
| Mare | Uncertain, maybe bitter | Unisex | Hebrew |
| Marguerite | Pearl | Female | Greek |
| Marigold | Golden Mary | Female | English |
| Marina | From the god Mars | Female | Latin |
| Meadow | A meadow | Female | English |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Mist | | Unisex | Hebrew |
| Misty | Misty | Female | English |
| Moon | Letters | Female | Korean |
| Moonlight | | Unisex | Hebrew |
| 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 |
| Myrtle | Myrtle | Female | English |
| Neva | Radiance | Female | Gaelic |
| Nevada | Snow-covered | Female | Spanish |
| Norma | Thor mind, Thor courage | Female | Gaelic |
| North | North | Male | English |
| Nova | New | Female | Latin |
| Ocean | Ocean | Female | Greek |
| Olive | Olive | Female | English |
| Onyx | A gemstone with bands of different colours. | Unisex | English |
| Opal | Jewel, gem | Female | Sanskrit |
| Orange | Orange | Unisex | English |
| Oriel | Bird | Female | English |
| Oriole | Golden | Female | Latin |
| Orion | Son Of Fire | Male | Greek |
| Pansy | Thought | Female | English |
| Panther | A black leopard | Unisex | English |
| Peaches | Red, yellow skinned fleshy fruit | Unisex | English |
| Pearl | Pearl | Female | English |