| Name | Meaning | Gender | Origin |
|---|
| Pablo | Small | Male | Latin |
| Pax | Peace | Unisex | Latin |
| Peaches | Red, yellow skinned fleshy fruit | Unisex | English |
| Peanut | Edible nuts eaten raw or roasted. | Unisex | English |
| Pep | | Unisex | Hebrew |
| Phoenix | Phoenix | Male | Greek |
| Pip | Lover of horses | Unisex | Greek |
| Pipsqueak | | Unisex | Hebrew |
| Poco | Little. | Unisex | English |
| Pongo | One who smells. | Unisex | English |
| Puddles | | Unisex | Hebrew |
| Puff | Expelling breath, a gust of wind or a small amount of smoke. | Unisex | English |
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Quentin | Fifth | Male | Latin |
| Quick | Speedy and fast. | Unisex | English |
| Rags | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Reed | Red | Unisex | English |
| Reeves | Son of Reeve | Male | English |
| Remus | Swift | Male | Latin |
| Rider | One who rides | Male | English |
| Riley | Rye clearing | Male | English |
| Robert | Bright fame | Male | Germanic |
| Rocky | Battle cry | Male | Germanic |
| Rogan | Red Haired | Male | English |
| Rusty | Rusty, full of rust | Unisex | American English |
| Sam | He is called god | Male | Hebrew |
| Sammy | His name is God | Unisex | Hebrew |
| Sanders | Defending men | Male | Greek |
| Sandy | Defending men | Male | Greek |