| Name | Meaning | Gender | Origin |
|---|
| Lloyd | gray | Male | Welsh |
| Logan | little hollow | Male | Scottish |
| Lug | Welsh Form Of Luke (Light) | Unisex | Welsh |
| Lugh | Luminescent | Unisex | Irish |
| Mac | Son of
| Male | Scottish |
| Macha | Irish Goddess | Female | Irish |
| MacKenzie | Child of the wise leader
| Female | Scottish |
| Maeve | goddess; a purple flower | Female | Irish |
| Mahon | Bear | Unisex | Irish |
| Mal | Chief
| Male | |
| Malcolm | Royal Blood | Male | Scottish |
| Mama Kitty | | Unisex | Hebrew |
| Marvin | beautiful sea; good friend | Male | Welsh |
| Maura | Great | Female | Scottish |
| Mavise | Joy
| Female | |
| Mayo | yew-tree plain | Male | Irish |
| Meg | Pearl | Female | English |
| Mel | Scottish, settlement on infertile land | Male | English |
| Melvin | Chief
| Male | English |
| Micheal | Who Is Like God | Unisex | Irish |
| Miles | of smiles | Male | Latin |
| Mischa | Who Is Like G-D | Male | Hebrew |
| Monahan | Religious Man | Unisex | Celtic |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |
| Monroe | mouth of the Roe River; wheelwright | Female | Scottish |