| Name | Meaning | Gender | Origin |
|---|
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Peewee | | Unisex | Hebrew |
| Pepe | He will enlarge | Unisex | Hebrew |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Phantom | Something elusive. A ghost | Unisex | English |
| Pierre | Stone | Male | Greek |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pip | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Pixel | | Unisex | Hebrew |
| Plato | Liberal | Male | Greek |
| Pockets | | Unisex | Hebrew |
| Poco | Little. | Unisex | English |
| Pogo | | Unisex | Hebrew |
| Pookie | | Unisex | Hebrew |
| Poopsie | | Unisex | Hebrew |
| Popcorn | Corn that when heated forms white edible puffs. | Unisex | English |
| Popeye | | Unisex | Hebrew |
| Porkchop | | Unisex | Hebrew |
| Prancer | | Unisex | Hebrew |
| Presley | Priest clearing | Unisex | English |
| Prince | Royal son | Male | English |
| Prozac | | Unisex | Hebrew |
| Puddin | | Unisex | Hebrew |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Queen | Female ruler | Unisex | English |
| Quincy | Fifth | Male | Latin |
| Quinn | Descendent of Cuinn | Male | Gaelic |
| Quinto | Fifth | Male | English |