| Name | Meaning | Gender | Origin |
|---|
| Sammy | His name is God | Unisex | Hebrew |
| Sandy | Defending men | Male | Greek |
| Sarge | Noncommissioned Army or Air Force rank | Unisex | English |
| Sasha | Defending men | Unisex | Greek |
| Scout | Observer | Unisex | American English |
| Shadow | Shadow | Unisex | English |
| Shorty | Of less than average size | Unisex | English |
| Smoky | | Unisex | Hebrew |
| Sparky | Animated, lively. | Unisex | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | English |
| Spot | After Data's cat on Star Trek: The Next Generation | Unisex | English |
| Squirt | Slang for a small person | Unisex | English |
| Suger | | Unisex | Hebrew |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| T-bone | A thick steak containing a T shaped bone. | Unisex | English |
| Teddy | Gift of God | Male | Greek |
| Thor | Thunder | Male | Norse |
| Titus | Of The Giants | Male | Latin |
| Toby | God is good | Unisex | Hebrew |
| Tulip | | Unisex | Hebrew |
| Wilbur | Will | Male | English |
| Winston | Joy stone | Male | English |
| Wolf | Wolf | Male | English |
| Yoda | | Unisex | Hebrew |
| Zeus | Myth Name | Male | Greek |
| Ziggy | Victory protection | Unisex | Germanic |