| Name | Meaning | Gender | Origin |
|---|
| Starlight | | Unisex | |
| Stetson | Cowboy Hat | Male | English |
| Stimpy | | Unisex | Hebrew |
| Stinker | | Unisex | |
| Stinky | | Unisex | |
| Stitch | after the character in the Lilo And Stitch cartoon | Unisex | |
| Storm | Storm
| Male | Word |
| Suede | Swedish | Male | |
| Sully | from the south meadow | Male | |
| Sunny | Abounding in sunshine, cheerful | Male | Nickname |
| Sweeny | | Unisex | Hebrew |
| Swiss | | Unisex | Hebrew |
| Tabasco | American spicy sauce made from red peppers. | Male | |
| Taboo | | Male | |
| Tac | | Unisex | |
| Taco | A folded fried tortilla filled with meat, cheese and spices. | Unisex | |
| Taffy | Sticky candy | Male | Welsh |
| Talulah | Leaping Water | Unisex | Native American |
| Tang | | Unisex | |
| Tango | | Male | |
| Tangy | | Unisex | |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | |
| Tanner | leather worker | Male | English |
| Tao | Philosophy and religion of China. | Unisex | |
| Tarbaby | | Unisex | |