| Name | Meaning | Gender | Origin |
|---|
| Leah | Weary | Female | Hebrew |
| Liberty | Freedom | Female | Latin |
| Licorice | Confection made from the licorice root. | Unisex | English |
| Lily | Lily | Female | English |
| Lola | Sorrows | Female | Spanish |
| Lotus | Flowery | Female | Greek |
| Lucky | Fortunate | Unisex | English |
| Lucy | Light | Female | Latin |
| Maddy | Pet form of Mad- names | Female | English |
| Maggie | Pearl | Female | Greek |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |
| Majestic | | Unisex | Hebrew |
| Mako | Child of truth | Unisex | Japanese |
| Manhattan | Whiskey | Female | English |
| Mara | Bitter | Female | Hebrew |
| Marble | | Unisex | Hebrew |
| Maverick | Dissenter | Unisex | English |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maxine | Little Maximus | Female | Latin |
| Medusa | Cunning | Unisex | English |
| Mickey | Who is like God? | Unisex | Hebrew |
| Mildred | Gentle strength | Female | English |
| Missy | Bee | Female | Greek |
| Misty | Misty | Female | English |
| Molly | Uncertain, maybe bitter | Female | Hebrew |
| Monster | A creature of frightening appearance | Unisex | English |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Morgan | Uncertain, perhaps bright sea | Female | Welsh |
| Mufasa | From The Lion King | Unisex | English |