| Name | Meaning | Gender | Origin |
|---|
| Mint | after the herb | Unisex | |
| Misty | misty.
| Female | English |
| Misty | misty.
| Female | English |
| Mocha | Coffee of high quality. | Female | Arabic |
| Monster | A creature of frightening appearance | Unisex | |
| Moon | Moon | Female | American |
| Morticia | Addams family | Female | |
| Mystery | Mystery | Female | English |
| Mystic | | Unisex | Hebrew |
| Mystique | Air of mystery.
| Female | |
| Negra | | Unisex | Hebrew |
| Nevermore | | Unisex | Hebrew |
| Nightmare | A dream of intense fear or horror. | Unisex | |
| Nightshade | | Unisex | Hebrew |
| Noir | | Unisex | |
| Obsidian | | Unisex | |
| Olive | kind one; olive tree, peace. Symbol of peace. A small oval fruit. | Female | English |
| Oni | Japanese for 'demon' | Unisex | |
| Pearl | Precious jewel. A hard, rounded gem, usually white in colour | Female | Latin |
| Persephone | The daughter of Demeter and Zeus who was abducted by Hades but rescued by her mother and thereafter spent six months of the year on earth and six months in the underworld.
| Female | Greek |
| Phantom | Something elusive. A ghost | Unisex | |
| Piewacket | | Unisex | |
| Pirate | | Unisex | |
| Poppy | Flower with four crumpled petals in red, orange or white colours | Female | Latin |
| Poppy | Flower with four crumpled petals in red, orange or white colours | Female | Latin |