| Name | Meaning | Gender | Origin |
|---|
| Lemon | Beloved man | Unisex | English |
| Lestat | | Unisex | Hebrew |
| Lexy | Defending men | Unisex | Greek |
| Luca | Man from Lucania | Unisex | Greek |
| Lucky | Fortunate | Unisex | English |
| Macaroni | A hollow tubed shaped pasta. | Unisex | English |
| Madison | Son of Maud | Unisex | English |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Magnum | A large type of wine bottle. | Unisex | English |
| Maisy | Pearl. Variant Of Margaret. | Unisex | English |
| Majestic | | Unisex | Hebrew |
| Mako | Child of truth | Unisex | Japanese |
| Mango | After the character in Saturday Night Live | Unisex | English |
| Marvel | Miracle | Unisex | English |
| Maxi | Pet form of names starting with Max | Unisex | English |
| Maximillion | | Unisex | Hebrew |
| Maxx | Greatest | Unisex | English |
| Mickey | Who is like God? | Unisex | Hebrew |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Mighty | | Unisex | Hebrew |
| Mini | Something smaller than others of its type | Unisex | English |
| Mitzi | Uncertain, maybe bitter | Unisex | Hebrew |
| Mocha | Coffee of high quality. | Unisex | English |
| Moondust | | Unisex | Hebrew |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Moxie | Ability to face difficulty with courage. | Unisex | English |
| Mozart | | Unisex | Hebrew |
| Mufasa | From The Lion King | Unisex | English |
| Muffin | A small cup shaped cake | Unisex | English |
| Muffy | | Unisex | Hebrew |