| Name | Meaning | Gender | Origin |
|---|
| Rambo | | Unisex | Hebrew |
| Rogue | | Unisex | Hebrew |
| Roman | Roman | Unisex | Latin |
| Sabre | | Unisex | Hebrew |
| Sammy | His name is God | Unisex | Hebrew |
| Saphire | Beautiful jewel | Unisex | Greek |
| Sasha | Defending men | Unisex | Greek |
| Sasquatch | Has extra toes and hence is a bigfoot | Unisex | English |
| Sassy | Lively and spirited | Unisex | English |
| Satan | The Devil and adversary of God | Unisex | English |
| Saturn | Sixth and second largest planet away from the Sun. | Unisex | English |
| Shark | | Unisex | Hebrew |
| Snowflake | Single flake or crystal of snow. | Unisex | English |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Tex | Of Texas | Unisex | English |
| Thunder | Stormy Tempered | Unisex | English |
| Titan | Powerful big man | Unisex | Greek |
| Trojan | | Unisex | Hebrew |
| Whisky | | Unisex | Hebrew |
| Wookie | | Unisex | Hebrew |