| Name | Meaning | Gender | Origin |
|---|
| Mouse | A small rodent with a long tail and small rounded ears. | Unisex | English |
| Moxie | Ability to face difficulty with courage. | Unisex | English |
| Muffin | A small cup shaped cake | Unisex | English |
| Muffy | | Unisex | Hebrew |
| Ned | Wealth protector | Unisex | English |
| Neptune | God of the sea | Unisex | Latin |
| Ninja | | Unisex | Hebrew |
| Obsidian | | Unisex | Hebrew |
| Onyx | A gemstone with bands of different colours. | Unisex | English |
| Oreo | American cookie brand consisting of two chocolate wafers with white cream filling. | Unisex | English |
| Osiris | Uncertain, perhaps throne of the eye | Unisex | Ancient Egyptian |
| Paisley | Church, cemetery | Unisex | English |
| Pal | A friend, buddy, chum. | Unisex | English |
| Pan | Herdsman | Unisex | Greek |
| Panda | A bear like Chinese mammal, with distinct black and white markings | Unisex | English |
| Panther | A black leopard | Unisex | English |
| Pasha | Passover | Unisex | Greek |
| Pax | Peace | Unisex | Latin |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Phantom | Something elusive. A ghost | Unisex | English |
| Piccolo | | Unisex | Hebrew |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Pig | | Unisex | Hebrew |
| Pikachu | | Unisex | Hebrew |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pipa | | Unisex | Hebrew |
| Pippi | Lover of horses | Unisex | Greek |
| Pirate | | Unisex | Hebrew |
| Pita | The fourth girl baby | Unisex | African |
| Pixel | | Unisex | Hebrew |