| Name | Meaning | Gender | Origin |
|---|
| Lucy | light: illumination.
| Female | English |
| Lug | Welsh Form Of Luke (Light) | Unisex | Welsh |
| Maddox | Beneficient | Male | Welsh |
| Mama | Informal for mother. | Unisex | |
| Manx | | Male | Hebrew |
| March | Walk Forth | Male | Latin |
| Mars | God Of War | Male | Latin |
| Marvin | beautiful sea; good friend | Male | Welsh |
| Max | Large spring | Male | English |
| Max | Large spring | Male | English |
| Mellon | Means Friend | Unisex | |
| Meredith | great ruler | Female | Welsh |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Mervyn | Famous Friend | Male | English |
| Missy | Informal term for young woman | Female | English |
| Molly | Bitter
| Female | English |
| Mordred | Brave | Unisex | English |
| Morgan | circle; sea | Female | Welsh |
| Morgen | morning | Unisex | |
| Nai | | Unisex | |
| Parry | son of Harry | Male | Welsh |
| Peaches | Red, yellow skinned fleshy fruit | Female | English |
| Peaches | Red, yellow skinned fleshy fruit | Female | English |
| Pembroke | bluff, headland | Male | English |
| Penn | enclosure | Male | English |