| Name | Meaning | Gender | Origin |
|---|
| Pumpkin | Large round fruit with orange skin | Unisex | English |
| Punkin | | Unisex | Hebrew |
| Puppy | | Unisex | Hebrew |
| Purdy | Variation on pretty. | Unisex | English |
| Queen | Female ruler | Unisex | English |
| Rags | | Unisex | Hebrew |
| Ralphie | Wise Ruler, Wolf | Unisex | English |
| Rambler | | Unisex | Hebrew |
| Rambo | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rebel | One that resists of defies authority | Unisex | English |
| Red | Red | Unisex | English |
| Reggie | Ruler with counsel | Unisex | Germanic |
| Reilly | Courageous, valiant | Unisex | Gaelic |
| Rocket | To move swiftly and powerfully | Unisex | English |
| Rocko | | Unisex | Hebrew |
| Roman | Roman | Unisex | Latin |
| Rowdy | Boisterous. Western Nickname. | Unisex | English |
| Roxie | Star | Unisex | Persian |
| Rusty | Rusty, full of rust | Unisex | American English |
| Ryder | One who rides | Unisex | English |
| Sable | Sable (black) | Unisex | English |
| Sage | Aromatic herb | Unisex | English |
| Sailor | Sailor | Unisex | English |
| Salem | Secure, peace | Unisex | Arabic |
| Salty | | Unisex | Hebrew |
| Sammy | His name is God | Unisex | Hebrew |
| Sampson | Sun | Unisex | Hebrew |
| Sarge | Noncommissioned Army or Air Force rank | Unisex | English |
| Sasha | Defending men | Unisex | Greek |