| Name | Meaning | Gender | Origin |
|---|
| Sasha | Defending men | Unisex | Greek |
| Sassy | Lively and spirited | Unisex | English |
| Scooter | One who goes suddenly and speedily. | Unisex | English |
| Scout | Observer | Unisex | American English |
| Shadow | Shadow | Unisex | English |
| Shiva | Auspicious | Unisex | Sanskrit |
| Sky | Sky | Unisex | Norse |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Unisex | English |
| Smoky | | Unisex | Hebrew |
| Sniper | A skilled shooter who spots targets from a concealed place. | Unisex | English |
| Snowball | | Unisex | Hebrew |
| Sparky | Animated, lively. | Unisex | English |
| Speedy | Rapid motion, swift. | Unisex | English |
| Spirit | Part of the human being associated with the mind. Vigorous or animated state - spirited. Also distilled alcohol. | Unisex | English |
| Stormy | Violent weather | Unisex | English |
| Tahoe | Edge of the lake | Unisex | Native American |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Teva | Nature | Unisex | Hebrew |
| Thunder | Stormy Tempered | Unisex | English |
| Tiger | Tiger | Unisex | English |
| Timber | Wood used as a building material. Also timber-wolf. | Unisex | English |
| Titan | Powerful big man | Unisex | Greek |
| Toby | God is good | Unisex | Hebrew |
| Toffee | A hard brown, chewy candy | Unisex | English |
| Turbo | Driven by a turbine - turbocharged | Unisex | English |
| Videl | Life. Used As Both Surname And Given Name. See Also Vito. | Unisex | English |
| Whisper | | Unisex | Hebrew |
| Wiley | Trapper or hunter | Unisex | English |