| Name | Meaning | Gender | Origin |
|---|
| Pea | | Unisex | Hebrew |
| Pinky | For Pinky Lee, the painting, and the color of her nose | Unisex | English |
| Pooh | | Unisex | Hebrew |
| Porky | | Unisex | Hebrew |
| Rambo | | Unisex | Hebrew |
| Rebel | One that resists of defies authority | Unisex | English |
| Red | Red | Unisex | English |
| Sable | Sable (black) | Unisex | English |
| 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 |
| Sassy | Lively and spirited | Unisex | English |
| Saturn | Sixth and second largest planet away from the Sun. | Unisex | English |
| Shade | Sweetly singing | Unisex | African |
| Shadow | Shadow | Unisex | English |
| Shorty | Of less than average size | Unisex | English |
| Snickers | A brand of candy bar. | Unisex | English |
| Snowflake | Single flake or crystal of snow. | Unisex | English |
| Snuggles | To curl up closely, cuddle | Unisex | English |
| Sparky | Animated, lively. | Unisex | English |
| Stormy | Violent weather | Unisex | English |
| Sunshine | Light from the sun | Unisex | English |
| Sweet | | Unisex | Hebrew |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Tanker | | Unisex | Hebrew |
| Tarzan | White skin | Unisex | Literary |
| T-bone | A thick steak containing a T shaped bone. | Unisex | English |
| Tex | Of Texas | Unisex | English |
| Thunder | Stormy Tempered | Unisex | English |