| Name | Meaning | Gender | Origin |
|---|
| Lady | A female title of nobility. | Female | |
| Lavender | Lavender, A Purple Flower | Female | English |
| Lily | Lily
| Female | English |
| Ludo | after the character in the movie Labyrinth | Unisex | |
| Luna | moon | Female | Latin |
| Macmillan | Son Of The Bald Man | Unisex | Scottish |
| Malkin | | Unisex | Hebrew |
| Marge | Pearl | Unisex | English |
| Marietta | Bitter | Female | Italian |
| Mary | bitter | Female | Hebrew |
| Millicent | after the character in D.C. Simpson's online comic Ozy and Millie | Female | |
| Mimsy | | Unisex | |
| Minerva | after the Roman goddess of the hunt | Female | Latin |
| Miranda | Admirable
| Female | Latin |
| Molly | Bitter
| Female | English |
| Moody | | Unisex | Hebrew |
| Morag | great | Female | Scottish |
| Muriel | myrrh; sea-bright; angel of June | Female | Irish |
| Myrtle | a flower, symbol of victory | Female | Greek |
| Narcissa | self-love | Female | Greek |
| Natalie | birthday of the Lord | Female | |
| Nymphadora | after the Nymphadora Tonks character in Harry Potter | Unisex | |
| Ollivander | | Unisex | |
| Pansy | thought | Female | English |
| Peeves | | Unisex | |