| Name | Meaning | Gender | Origin |
|---|
| Melanie | Black | Female | Greek |
| Melantha | Dark flower | Female | Greek |
| Melchior | King city | Male | Persian |
| Mercy | Compassion | Female | English |
| Meredith | Great lord | Female | Welsh |
| Merle | Contracted form of Meriel | Female | English |
| Merlin | Sea fort | Male | Welsh |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Millicent | Strong work | Female | Germanic |
| Minerva | Mind | Female | Latin |
| Mist | | Unisex | Hebrew |
| Misty | Misty | Female | English |
| Miyuki | Silent snow | Unisex | Japanese |
| Moon | Letters | Female | Korean |
| Moonlight | | Unisex | Hebrew |
| Morgan | Uncertain, perhaps bright sea | Female | Welsh |
| Morgana | Uncertain, perhaps bright sea | Female | Welsh |
| Morwenna | Maid | Female | Welsh |
| Muriel | Bright as the sea | Female | Gaelic |
| Naida | As a water nymph | Female | Greek |
| Narcissa | Self-love | Female | Greek |
| Nevada | Snow-covered | Female | Spanish |
| Niall | Champion | Unisex | Gaelic |
| Niamh | Radiance | Unisex | Gaelic |
| Nicholas | Victory of the people | Male | Greek |
| Nicodemus | Victory of the people | Male | Greek |
| Nigel | Champion From The Irish And Scottish Niall. | Male | Gaelic |
| Nimue | The Lady Of The Lake | Female | Welsh |
| Nirvana | Bliss | Female | Sanskrit |
| Nisha | Night | Female | Sanskrit |