| Name | Meaning | Gender | Origin |
|---|
| Sir | | Unisex | Hebrew |
| Sky | Sky | Unisex | Norse |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Unisex | English |
| Smoky | | Unisex | Hebrew |
| Sooty | Covered with soot | Unisex | English |
| Spade | | Unisex | Hebrew |
| Spider | An eight legged insect | Unisex | English |
| Spot | After Data's cat on Star Trek: The Next Generation | Unisex | English |
| Star | Star | Female | Latin |
| Storm | Violent weather | Female | English |
| Stormy | Violent weather | Unisex | English |
| Sugar | A sweet powder from sugar cane. Slang for sweetheart. | Female | English |
| Sullivan | Keen eye | Male | Gaelic |
| Sully | Keen eye | Male | Gaelic |
| Tango | | Unisex | Hebrew |
| Tara | Crag | Female | Gaelic |
| Tess | Harvester | Female | Greek |
| Thunder | Stormy Tempered | Unisex | English |
| Tia | Princess Or Crowned One | Female | English |
| Tucker | Someone who folds cloth | Male | English |
| Tuff | Fun spelling of tough; strong and resilient. | Unisex | English |
| Tulip | | Unisex | Hebrew |
| Twister | A cyclone or tornado. | Unisex | English |
| Twizzler | | Unisex | Hebrew |
| Ty | Abbreviation For Names Beginning With Ty-. | Unisex | American English |
| Ulysses | Walker | Male | Greek |
| Uno | | Unisex | Hebrew |
| Vanilla | Flavouring agent from the vanilla bean | Unisex | English |
| Velvet | Soft | Female | English |
| Veronica | Victory bringer | Female | Greek |