| Name | Meaning | Gender | Origin |
|---|
| Negra | | Unisex | Hebrew |
| Nevermore | | Unisex | Hebrew |
| Night | | Male | |
| Nightmare | A dream of intense fear or horror. | Unisex | |
| Nightshade | | Unisex | Hebrew |
| Ninja | | Male | |
| Noir | | Unisex | |
| Obsidian | | Unisex | |
| Omen | | Male | |
| Oni | Japanese for 'demon' | Unisex | |
| Onyx | A gemstone with bands of different colours. | Male | |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Male | |
| Orpheus | | Male | |
| Ozzy | From Osbert - Divinely bright warrior. | Male | |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Male | |
| Panther | A black leopard | Male | |
| Penguin | | Male | |
| Pepper | A spice or condiment. | Male | Sanskrit |
| Pepsi | Brand of cola soft drink. | Male | |
| Phantom | Something elusive. A ghost | Unisex | |
| Piewacket | | Unisex | |
| Pirate | | Unisex | |
| Poe | peacock | Male | |
| Raisin | | Unisex | |