| Name | Meaning | Gender | Origin |
|---|
| Marianne | Combination of Marie and Anne | Female | French |
| Marigold | Golden Mary | Female | English |
| Marin | From the god Mars | Unisex | Latin |
| Marion | Uncertain, maybe bitter | Female | Hebrew |
| Marius | From the god Mars | Male | Latin |
| Marjorie | Pearl | Female | Greek |
| Marlow | Drained lake | Male | English |
| Martin | From the god Mars | Male | Latin |
| Mary | Bitter | Female | Hebrew |
| Matilda | Powerful battler | Female | Germanic |
| May | The fifth month of the year | Female | English |
| Meg | Pearl | Female | Greek |
| Melanctha | Black Flower | Female | Greek |
| Melchior | King city | Male | Persian |
| Mercedes | Mercies | Female | Spanish |
| Mercy | Compassion | Female | English |
| Merlin | Sea fort | Male | Welsh |
| Merry | Compassion | Female | English |
| Mignon | Cute | Female | French |
| Miles | Uncertain, perhaps peaceful | Male | Germanic |
| Milo | Uncertain, perhaps peaceful | Male | Germanic |
| Mina | Will, desire + helmet, protection | Female | Germanic |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Minta | Plant Name | Female | English |
| Miranda | She who must be admired | Female | Latin |
| Moira | Uncertain, maybe bitter | Female | Hebrew |
| Mordecai | Little man | Male | Hebrew |
| Morgan | Uncertain, perhaps bright sea | Female | Welsh |
| Morgen | Sea-born | Female | Welsh |
| Myra | Uncertain, perhaps myrrh, unguent | Female | Latin |