| Name | Meaning | Gender | Origin |
|---|
| Magenta | A vivid purplish red colour | Unisex | English |
| Maggie | Pearl | Female | Greek |
| Maisie | Pet form of Mairead | Female | Gaelic |
| Maisy | Pearl. Variant Of Margaret. | Unisex | English |
| Malibu | Noisy Surf | Unisex | Native American |
| Mallory | Luckless | Female | French |
| Mango | After the character in Saturday Night Live | Unisex | English |
| Marigold | Golden Mary | Female | English |
| Marilyn | Uncertain, maybe bitter | Female | Hebrew |
| Marley | Pleasant wood | Female | English |
| Marly | From The March Meadow | Female | English |
| Marshmallow | A soft spongy sweet confectionery. Also a timid person. | Unisex | English |
| Mary | Bitter | Female | Hebrew |
| Mavis | Song thrush | Male | English |
| Maxi | Pet form of names starting with Max | Unisex | English |
| May | The fifth month of the year | Female | English |
| Maya | Uncertain, perhaps mother or great one | Female | Greek |
| Meadow | A meadow | Female | English |
| Melody | Melody | Female | Greek |
| Mercy | Compassion | Female | English |
| Meryl | Bright as the sea | Unisex | Gaelic |
| Mia | Uncertain, maybe bitter | Female | Hebrew |
| Millie | Labour | Female | Germanic |
| Mimi | Uncertain, maybe bitter | Female | Hebrew |
| Mini | Something smaller than others of its type | Unisex | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Minx | | Unisex | Hebrew |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mocha | Coffee of high quality. | Unisex | English |