| Name | Meaning | Gender | Origin |
|---|
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pearl | Pearl | Female | English |
| Penny | Weaver | Female | Greek |
| Pepe | He will enlarge | Unisex | Hebrew |
| Pepper | Pepper | Female | English |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Pip | Lover of horses | Unisex | Greek |
| Piper | A pipe player | Female | English |
| Pipsqueak | | Unisex | Hebrew |
| Pixie | A fairy like creature. Playful and mischievous | Female | English |
| Pluto | Wealth, riches | Unisex | Greek |
| Poco | Little. | Unisex | English |
| Princess | Royal son | Female | English |
| Puddles | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Queenie | Female ruler | Female | English |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rasta | | Unisex | Hebrew |
| Red | Red | Unisex | English |
| Rina | Pet form of names in -rina | Female | English |
| Rosie | Rose | Female | Latin |
| Roxana | Star | Female | Persian |
| Roxy | Star | Female | Persian |
| Ruby | Red | Female | Latin |
| Sadie | Princess | Female | Hebrew |
| Salem | Secure, peace | Unisex | Arabic |
| Sammy | His name is God | Unisex | Hebrew |
| Saphire | Beautiful jewel | Unisex | Greek |
| Sasha | Defending men | Unisex | Greek |
| Sassy | Lively and spirited | Unisex | English |