| Name | Meaning | Gender | Origin |
|---|
| Osiris | Uncertain, perhaps throne of the eye | Unisex | Ancient Egyptian |
| Paws | | Unisex | Hebrew |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pepsi | Brand of cola soft drink. | Unisex | English |
| Petal | A section of a flower | Unisex | English |
| Pickle | | Unisex | Hebrew |
| Pickles | Food flavored in a solution of vinegar | Unisex | English |
| Pico | | Unisex | Hebrew |
| Pip | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Pj | | Unisex | Hebrew |
| Poco | Little. | Unisex | English |
| Porthos | | Unisex | Hebrew |
| Puddles | | Unisex | Hebrew |
| Puma | | Unisex | Hebrew |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Rags | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rebel | One that resists of defies authority | Unisex | English |
| Reno | Ruler with counsel | Unisex | Germanic |
| Romy | Sea dew | Unisex | Latin |
| Rusty | Rusty, full of rust | Unisex | American English |
| Rylee | Rye clearing | Unisex | English |
| Sammy | His name is God | Unisex | Hebrew |
| Sarge | Noncommissioned Army or Air Force rank | Unisex | English |
| Sasha | Defending men | Unisex | Greek |
| Scooby | | Unisex | Hebrew |
| Scout | Observer | Unisex | American English |
| Sexy | | Unisex | Hebrew |
| Shadow | Shadow | Unisex | English |