| Name | Meaning | Gender | Origin |
|---|
| Paws | | Unisex | Hebrew |
| Pluto | Wealth, riches | Unisex | Greek |
| Pogo | | Unisex | Hebrew |
| Pretzel | Glazed, salted and brittle biscuit in the form of a knot or stick. | Unisex | English |
| Radar | | Unisex | Hebrew |
| Rambo | | Unisex | Hebrew |
| Rascal | One that is playfully mischievous | Unisex | English |
| Rebel | One that resists of defies authority | Unisex | English |
| Rhys | Enthusiasm | Unisex | Welsh |
| Rocket | To move swiftly and powerfully | Unisex | English |
| Rodger | Famous spear | Unisex | English |
| Roman | Roman | Unisex | Latin |
| Rusty | Rusty, full of rust | Unisex | American English |
| Sage | Aromatic herb | Unisex | English |
| Sailor | Sailor | Unisex | English |
| Scamper | | Unisex | Hebrew |
| Scooby | | Unisex | Hebrew |
| Scooter | One who goes suddenly and speedily. | Unisex | English |
| Scotch | Scotch whiskey. | Unisex | English |
| Scout | Observer | Unisex | American English |
| Shadow | Shadow | Unisex | English |
| Skippy | Master of a Ship | Unisex | American English |
| Slate | | Unisex | Hebrew |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Unisex | English |
| Snickers | A brand of candy bar. | Unisex | English |
| Snoopy | | Unisex | Hebrew |
| Socks | Short stockings finishing above the ankle | Unisex | English |
| Spanky | | Unisex | Hebrew |
| Sparky | Animated, lively. | Unisex | English |
| Speedy | Rapid motion, swift. | Unisex | English |