| Name | Meaning | Gender | Origin |
|---|
| Piece | | Unisex | |
| Piglet | | Unisex | |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | |
| Pinto | | Unisex | |
| Pip | Small seed of a fruit. Also "Pipsqueak" one that is small | Male | English |
| Pippa | lover of horses | Female | English |
| Pixel | | Male | |
| Pixie | A fairy like creature. Playful and mischievous | Female | |
| Pixie | A fairy like creature. Playful and mischievous | Female | Swedish |
| Popcorn | Corn that when heated forms white edible puffs. | Unisex | |
| Posy | a bunch of flowers | Female | English |
| Precious | One who is beloved, a darling. | Female | Latin |
| Princess | Female member of a royal family | Female | Word |
| Prunella | small plum | Female | Latin |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Male | |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Male | |
| Raisin | | Unisex | |
| Renny | little prosperous one | Male | Anglicized |
| Rhode Island | | Male | Hebrew |
| Robin | Famed: bright: shining Form of Robert popular since the medieval days of Robin Hood. Robinson: (English) Son of Robert Famed: bright: shining. Surname.
| Male | |
| Rochelle | from the little rock | Female | |
| Roo | | Unisex | Hebrew |
| Rosetta | splendid | Female | Persian |
| Rowan | red-haired; rugged | Male | Scottish |
| Ruby | Jewel
| Female | Latin |