| Name | Meaning | Gender | Origin |
|---|
| Pee Wee Herman | | Unisex | Hebrew |
| 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 |
| Persil | | Unisex | Hebrew |
| Petal | A section of a flower | Female | Greek |
| Peter Pan | | Unisex | Hebrew |
| Petunia | trumpet-shaped flower | Female | English |
| Peyton | From The Fighter's Farm | Female | English |
| Pheobe | | Unisex | |
| Phyllis | A green branch.
| Female | Greek |
| Pickles | Food flavored in a solution of vinegar | Unisex | |
| Pig | | Unisex | Hebrew |
| Pilar | pillar | Unisex | |
| Ping | | Unisex | |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | |
| Pinnochio | | Unisex | Hebrew |
| Pinstripe | | Unisex | |
| Pinto | | Unisex | |
| Piper | Piper
| Female | English |
| Pippa | lover of horses | Female | English |
| Pistachio | | Unisex | |
| Pistol | | Unisex | |
| Pitch | Pitch black! | Unisex | |
| Pitch | Pitch black! | Unisex | |
| Pixie | A fairy like creature. Playful and mischievous | Female | Swedish |
| Pixie | A fairy like creature. Playful and mischievous | Female | |