| Name | Meaning | Gender | Origin |
|---|
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pip | Lover of horses | Unisex | Greek |
| Pippin | Foreigner, stranger | Unisex | Latin |
| Pipsqueak | | Unisex | Hebrew |
| Pixel | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Poco | Little. | Unisex | English |
| Polly | Bitter | Female | Hebrew |
| Pookie | | Unisex | Hebrew |
| Popcorn | Corn that when heated forms white edible puffs. | Unisex | English |
| Poppy | Poppy flower | Female | English |
| Posy | He will enlarge | Female | Hebrew |
| Precious | Loved | Female | English |
| Prince | Royal son | Male | English |
| Princess | Royal son | Female | English |
| Prunella | Plum | Female | Latin |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Queenie | Female ruler | Female | English |
| Quimby | From the woman's estate | Unisex | English |
| Raisin | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Renny | To Rise Again. | Male | English |
| Robin | Bright fame | Female | Germanic |
| Rochelle | Battle cry | Female | Germanic |
| Rollo | Famous wolf | Male | English |
| Romeo | Pilgrim to Rome | Male | Italian |
| Roslin | Red Haired | Female | English |
| Rowan | Little red one | Male | Gaelic |
| Roxie | Star | Unisex | Persian |