| Name | Meaning | Gender | Origin |
|---|
| Lightning | | Unisex | Hebrew |
| Little | | Male | Hebrew |
| Lucie | Light | Unisex | French |
| Lucius | Light | Male | Roman |
| Lucky | Having good luck. | Male | Word |
| Maddox | Beneficient | Male | Welsh |
| Magic | Possessing qualities that produce baffling effects | Male | Word |
| Magic | Possessing qualities that produce baffling effects | Male | Word |
| Magnus | One who is great.
| Male | Latin |
| Major | Army or Air Force rank above Captain but below Lieutenant Colonel | Male | Latin |
| Mama | Informal for mother. | Unisex | |
| Mango | after the character in Saturday Night Live | Unisex | |
| Manhattan | Whiskey | Unisex | |
| Manson | | Unisex | Hebrew |
| Maui | | Unisex | |
| Maximus | greatest | Male | Latin |
| Memphis | City Of Moph | Male | Hebrew |
| Mickey | Abbreviation of Michael and Micah Who is like God?
| Male | English |
| Mikey | | Unisex | |
| Minor | | Unisex | Hebrew |
| Mir | Peaceful | Unisex | Slavic |
| Mojo | Good luck charm. | Unisex | |
| Monster | A creature of frightening appearance | Unisex | |
| Montana | Mountain. | Male | Spanish |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | |