| Name | Meaning | Gender | Origin |
|---|
| Legolas | Green leaf | Unisex | Literary |
| Lex | Defending men | Unisex | Greek |
| Lightening | | Unisex | Hebrew |
| Lightning | | Unisex | Hebrew |
| Liquorice | | Unisex | Hebrew |
| Lucky | Fortunate | Unisex | English |
| Lundy | Born On Monday | Unisex | English |
| Lyric | Lyric | Unisex | English |
| Maestro | | Unisex | Hebrew |
| Magenta | A vivid purplish red colour | Unisex | English |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |
| Marlin | A Form Of Merle. | Unisex | English |
| Marmite | | Unisex | Hebrew |
| Maui | God of fire | Unisex | Hawaiian |
| Maybell | Beautiful 5Th Month | Unisex | English |
| Micro | | Unisex | Hebrew |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Milli | Labour | Unisex | Germanic |
| Mischief | One that causes minor trouble or disturbances | Unisex | English |
| Mist | | Unisex | Hebrew |
| Mister | | Unisex | Hebrew |
| Mittens | | Unisex | Hebrew |
| Mocha | Coffee of high quality. | Unisex | English |
| Mojo | Good luck charm. | Unisex | English |
| Monet | Solitary | Unisex | French |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | English |
| Mozart | | Unisex | Hebrew |
| Muffin | A small cup shaped cake | Unisex | English |