| Name | Meaning | Gender | Origin |
|---|
| Peter | A rock. Peter the biblical fisherman and apostle had impulsive nature and rocklike faith. In Catholic tradition he is the first pope.
| Male | Greek |
| Peters | | Unisex | |
| Petit | | Unisex | |
| Phantom | Something elusive. A ghost | Unisex | |
| Phoebe | bright one | Female | Greek |
| Phoebe | bright one | Female | Greek |
| Piccolo | | Unisex | |
| Pickering | | Unisex | |
| Pickle | | Unisex | Hebrew |
| Pickles | Food flavored in a solution of vinegar | Unisex | |
| Piece | | Unisex | |
| Piglet | | Unisex | |
| Pinhead | | Male | Hebrew |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | |
| Pippa | lover of horses | Female | English |
| Pippi | lover of horses | Female | Norse |
| Pippy | | Unisex | |
| Pixie | A fairy like creature. Playful and mischievous | Female | |
| Pixie | A fairy like creature. Playful and mischievous | Female | Swedish |
| Plante | | Unisex | |
| Polkadot | | Male | |
| Pompom | | Unisex | |
| Pookyshnukums | | Unisex | |
| Pooneh | | Unisex | |
| Popcorn | Corn that when heated forms white edible puffs. | Unisex | |