| Name | Meaning | Gender | Origin |
|---|
| Medusa | Cunning | Unisex | English |
| Meeko | | Unisex | Hebrew |
| Midnight | Intense darkness, the middle of the night | Unisex | English |
| Mighty | | Unisex | Hebrew |
| Miss | | Unisex | Hebrew |
| Mitsu | Bear | Unisex | Native American |
| Mojo | Good luck charm. | Unisex | English |
| Monster | A creature of frightening appearance | Unisex | English |
| Montana | Mountainous | Unisex | Latin |
| Moose | Largest member of the deer family. Moose have heavy brown bodies with humped shoulders and broad antlers. | Unisex | English |
| Nana | Grace | Unisex | Hebrew |
| Neon | | Unisex | Hebrew |
| Neptune | God of the sea | Unisex | Latin |
| Ninja | | Unisex | Hebrew |
| Onyx | A gemstone with bands of different colours. | Unisex | English |
| Panther | A black leopard | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Phantom | Something elusive. A ghost | Unisex | English |
| Pirate | | Unisex | Hebrew |
| Popeye | | Unisex | Hebrew |
| Porkchop | | Unisex | Hebrew |
| Psycho | | Unisex | Hebrew |
| Puddles | | Unisex | Hebrew |
| Puma | | Unisex | Hebrew |
| Punk | | Unisex | Hebrew |
| Queen | Female ruler | Unisex | English |
| Rabia | Springtime | Unisex | Swahili |
| Rage | | Unisex | Hebrew |
| Rambo | | Unisex | Hebrew |
| Reagan | Descendent of Riagán | Unisex | Gaelic |