| Name | Meaning | Gender | Origin |
|---|
| Marshmallow | A soft spongy sweet confectionery. Also a timid person. | Unisex | |
| Mateus | Gift Of God | Unisex | Portuguese |
| Melody | song | Female | Greek |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Mila | Dear One | Female | Russian |
| Mina | Precious Stone | Female | Hindi |
| Mindy | From Minta - Remembered with love | Female | English |
| Mine | a resolute protector | Unisex | |
| Minny | | Female | Hebrew |
| Mistress | | Unisex | Hebrew |
| Monica | advisor | Female | Latin |
| Monkey | | Unisex | |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Moonbeam | | Unisex | |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | |
| Movie Star | | Unisex | Hebrew |
| Muffin | A small cup shaped cake | Unisex | |
| Munchkin | A very small elflike person. | Unisex | |
| Muppet | | Unisex | Hebrew |
| My love | | Unisex | Hebrew |
| Nasty | | Unisex | Hebrew |
| Nemo | from the glen | Male | Greek |
| Nice Guy | | Unisex | Hebrew |
| Og | | Unisex | Hebrew |