| Name | Meaning | Gender | Origin |
|---|
| Lightning | | Unisex | Hebrew |
| Linus | flaxen-haired | Male | Greek |
| Lloyd | gray | Male | Welsh |
| Lunar | | Male | |
| Macduff | Son Of The Black Man | Unisex | Scottish |
| Maizy | Pearl | Unisex | Scottish |
| Malcolm | Royal Blood | Male | Scottish |
| Mamo | Saffron Flower, Yellow Bird | Unisex | Hawaiian |
| Mao | Egyptian for Cat | Male | |
| Marshmallow | A soft spongy sweet confectionery. Also a timid person. | Unisex | |
| Mash | | Unisex | |
| Mel | Scottish, settlement on infertile land | Male | English |
| Merle | Bright Sea | Male | English |
| Merlot | | Male | |
| Merlyn | Sea Fortress | Unisex | English |
| Midnight | Intense darkness, the middle of the night | Male | English |
| Milk | | Unisex | Hebrew |
| Mink | | Unisex | |
| Minor | | Unisex | Hebrew |
| Modena | | Unisex | Hebrew |
| Molasses | A thick dark brown sugary syrup | Unisex | |
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | |
| Mudd | | Unisex | Hebrew |
| Mushroom | A fleshy vegetable with an umbrella shaped cap atop a stalk. | Unisex | |
| Mustard | Seeds ground into paste and used as a spicy condiment | Unisex | |