| Name | Meaning | Gender | Origin |
|---|
| Lucy | Light | Female | Latin |
| Maddie | Pet form of Mad- names | Unisex | English |
| Maddy | Pet form of Mad- names | Female | English |
| Maestro | | Unisex | Hebrew |
| Maggie | Pearl | Female | Greek |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |
| Marge | Pearl | Female | Greek |
| Marlene | Of Magdala | Female | Hebrew |
| Marley | Pleasant wood | Female | English |
| Marlo | Drained lake | Female | English |
| Mary | Bitter | Female | Hebrew |
| Matrix | | Unisex | Hebrew |
| May | The fifth month of the year | Female | English |
| Maya | Uncertain, perhaps mother or great one | Female | Greek |
| Mayhem | | Unisex | Hebrew |
| Meadow | A meadow | Female | English |
| Meg | Pearl | Female | Greek |
| Mia | Uncertain, maybe bitter | Female | Hebrew |
| Mickey | Who is like God? | Unisex | Hebrew |
| Micro | | Unisex | Hebrew |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Moet | Brand of French Champagne | Unisex | English |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Morgan | Uncertain, perhaps bright sea | Female | Welsh |
| Mozart | | Unisex | Hebrew |