| Name | Meaning | Gender | Origin |
|---|
| Maddock | Good | Male | Welsh |
| Maddy | Pet form of Mad- names | Female | English |
| Maggie | Pearl | Female | Greek |
| Mako | Child of truth | Unisex | Japanese |
| Malo | Winner | Male | Arabic |
| Manfred | Peaceful strength | Male | Germanic |
| Marlin | A Form Of Merle. | Unisex | English |
| Marquis | Lord of the marches | Male | French |
| Marvin | Uncertain, possibly eminent marrow | Male | Welsh |
| Mauro | Moor | Male | Latin |
| Max | Little Maximus | Male | Latin |
| Maxy | Little Maximus | Unisex | Latin |
| Meg | Pearl | Female | Greek |
| Megan | Pearl | Female | Greek |
| Melania | Black | Female | Greek |
| Melody | Melody | Female | Greek |
| Merlin | Sea fort | Male | Welsh |
| Merry | Compassion | Female | English |
| Mick | Who is like God? | Male | Hebrew |
| Mini | Something smaller than others of its type | Unisex | English |
| Minnie | Will, desire + helmet, protection | Female | Germanic |
| Mint | After the herb | Unisex | English |
| Miranda | She who must be admired | Female | Latin |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Mollie | Uncertain, maybe bitter | Female | Hebrew |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Monty | Gomeric's hill | Male | French |
| Moxie | Ability to face difficulty with courage. | Unisex | English |
| Munchkin | A very small elflike person. | Unisex | English |