| Name | Meaning | Gender | Origin |
|---|
| Leo | Lion | Male | Latin |
| Lester | From Leicester | Male | English |
| Levi | Combined | Male | Hebrew |
| Lorenzo | Man from Laurentum | Male | Latin |
| Lucky | Fortunate | Unisex | English |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |
| Malcolm | Columba's servant | Male | Gaelic |
| Marble | | Unisex | Hebrew |
| Marcus | From the god Mars | Male | Latin |
| Mark | From the god Mars | Male | Latin |
| Marley | Pleasant wood | Female | English |
| Marshall | Horse servant | Male | Germanic |
| Martin | From the god Mars | Male | Latin |
| Marvin | Uncertain, possibly eminent marrow | Male | Welsh |
| Matt | Gift of God | Male | Hebrew |
| Maurice | Moor | Male | Latin |
| Max | Little Maximus | Male | Latin |
| Maximilian | Little Maximus | Male | Latin |
| Maynard | Mighty and brave | Male | Germanic |
| Melvin | Uncertain, possibly bad town | Male | English |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Miles | Uncertain, perhaps peaceful | Male | Germanic |
| Milo | Uncertain, perhaps peaceful | Male | Germanic |
| Mocha | Coffee of high quality. | Unisex | English |
| Montana | Mountainous | Unisex | Latin |
| Monty | Gomeric's hill | Male | French |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Mozart | | Unisex | Hebrew |
| Murray | Man of the sea | Male | Gaelic |