| Name | Meaning | Gender | Origin |
|---|
| Lucky | Fortunate | Unisex | English |
| Lucy | Light | Female | Latin |
| Luke | Man from Lucania | Male | Greek |
| Luna | Moon | Female | Latin |
| Macaroni | A hollow tubed shaped pasta. | Unisex | English |
| Maddy | Pet form of Mad- names | Female | English |
| Madison | Son of Maud | Unisex | English |
| Maggie | Pearl | Female | Greek |
| Magic | Possessing qualities that produce baffling effects | Unisex | English |
| Magna | Thinking | Female | Indian |
| Magnolia | Magnol's flower | Female | Latin |
| Magnum | A large type of wine bottle. | Unisex | English |
| Mahogany | American evergreen tree valued for its hard, red-brown wood | Female | English |
| Maisy | Pearl. Variant Of Margaret. | Unisex | English |
| Majestic | | Unisex | Hebrew |
| Major | Greater | Male | Latin |
| Mako | Child of truth | Unisex | Japanese |
| Mandy | She who must be loved | Female | Latin |
| Mango | After the character in Saturday Night Live | Unisex | English |
| Manley | Common clearing | Male | English |
| Manny | God is with us | Male | Hebrew |
| Marcus | From the god Mars | Male | Latin |
| Maria | Bitter | Female | Hebrew |
| Maricruz | Mary of the Cross | Female | Spanish |
| Marigold | Golden Mary | Female | English |
| Marilu | | Female | Hebrew |
| Marilyn | Uncertain, maybe bitter | Female | Hebrew |
| Marley | Pleasant wood | Female | English |
| Marlo | Drained lake | Female | English |
| Marmaduke | Devotee of Maedoc | Male | Gaelic |