| Name | Meaning | Gender | Origin |
|---|
| Kyo | Approval, Ginger, Or Large | Unisex | Japanese |
| Lily | Lily
| Female | English |
| Louie | renowned warrier | Male | English |
| Lucifer | light-bearer | Male | Latin |
| Lucifer | light-bearer | Male | Latin |
| Luna | moon | Female | Latin |
| Macavity | | Unisex | |
| MacKenzie | Child of the wise leader
| Female | Scottish |
| Maisie | child of light | Female | Scottish |
| Malinki | after Lynley Dodd's childrens book Slinky Malinki | Unisex | |
| Man | | Unisex | Hebrew |
| Master | | Unisex | |
| Maurice | moorish; dark; moor land | Male | Latin |
| Meeko | | Male | |
| Mehitabel | Delighted | Female | Hebrew |
| Meow | | Unisex | |
| Merlin | Character on Chocolate Frog card.
| Male | Welsh |
| Mickey | Abbreviation of Michael and Micah Who is like God?
| Male | English |
| Midnight | Intense darkness, the middle of the night | Male | English |
| Milo | Merciful.
| Male | Latinized |
| Milo | Merciful.
| Male | Latinized |
| Minnie | Form of Williamina
| Female | English |
| Minnie Mouse | | Unisex | |
| Minoes | | Unisex | Hebrew |
| Mirage | | Male | |