| Name | Meaning | Gender | Origin |
|---|
| Ricardo | Strong power | Male | French |
| Rocky | Battle cry | Male | Germanic |
| Salvador | Saviour | Male | Latin |
| Samson | Sun | Male | Hebrew |
| Sarge | Noncommissioned Army or Air Force rank | Unisex | English |
| Sativa | | Unisex | Hebrew |
| Shaka | | Unisex | Hebrew |
| Socrates | Uncertain meaning | Male | Greek |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | English |
| Sprague | High-energy | Male | French |
| Stetson | Son of Stephen | Male | English |
| Stormy | Violent weather | Unisex | English |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Tansy | Immortal | Male | Greek |
| Terence | Uncertain | Male | Latin |
| Tex | Of Texas | Unisex | English |
| Thaddeus | Uncertain, perhaps praised or heart | Male | Aramaic |
| Thor | Thunder | Male | Norse |
| Thunder | Stormy Tempered | Unisex | English |
| Tino | From the god Mars | Male | Latin |
| Titus | Of The Giants | Male | Latin |
| Tokala | Dark fox | Male | Native American |
| Tyson | Son of Dye | Male | English |
| Ulrich | Powerful through his inheritance | Male | Germanic |
| Ulysses | Walker | Male | Greek |
| Uzi | My Strength | Unisex | English |
| Vash | | Unisex | Hebrew |
| Weston | West enclosure | Male | English |
| Wolf | Wolf | Male | English |
| Xylon | Woods, wooded | Unisex | Greek |