| Name | Meaning | Gender | Origin |
|---|
| Scout | Observer | Unisex | American English |
| Shark | | Unisex | Hebrew |
| Shiloh | Gift for him | Unisex | Hebrew |
| Shorty | Of less than average size | Unisex | English |
| Skinny | | Unisex | Hebrew |
| Sky | Sky | Unisex | Norse |
| Smiley | | Unisex | Hebrew |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Unisex | English |
| Snake | | Unisex | Hebrew |
| Solo | | Unisex | Hebrew |
| Spanky | | Unisex | Hebrew |
| Spider | An eight legged insect | Unisex | English |
| Spot | After Data's cat on Star Trek: The Next Generation | Unisex | English |
| Spud | Slang for potato. | Unisex | English |
| Stinky | | Unisex | Hebrew |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Tarzan | White skin | Unisex | Literary |
| Taz | Wild Animal, Thrid Born | Unisex | American |
| Tex | Of Texas | Unisex | English |
| Thunder | Stormy Tempered | Unisex | English |
| Tic | | Unisex | Hebrew |
| Tiger | Tiger | Unisex | English |
| Tiny | Extremely small | Unisex | English |
| Titan | Powerful big man | Unisex | Greek |
| Toby | God is good | Unisex | Hebrew |
| Trigger | | Unisex | Hebrew |
| Trojan | | Unisex | Hebrew |
| Trouble | A cause of disturbance or difficulty. | Unisex | English |
| Tuff | Fun spelling of tough; strong and resilient. | Unisex | English |
| Tweeker | | Unisex | Hebrew |