| Name | Meaning | Gender | Origin |
|---|
| Stewie | | Unisex | |
| Stimpy | | Unisex | Hebrew |
| Streaky | | Unisex | |
| Stubbs | | Unisex | |
| Sumo | Form of wrestling. | Unisex | |
| Sweetie | Sweetheart. | Male | |
| Sylvester | A cartoon cat that tried to eat the bird character Tweety. He was a black and white cat.
| Male | Latin |
| Tabor | In the bible Mt. Tabor is a landmark mountain near Nazareth.
| Male | Hebrew |
| Taffy | Sticky candy | Male | Welsh |
| Tailspin | | Unisex | |
| Tama | Jewel | Unisex | Japanese |
| Tao | Philosophy and religion of China. | Unisex | |
| Tattoo | | Unisex | |
| T-Bone | A thick steak containing a T shaped bone. | Unisex | |
| Tiddles | | Unisex | |
| Tiffy | | Unisex | Hebrew |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tigger | from Winnie the Pooh | Unisex | |
| Tiki | Maori figure representing an ancestor. A wooden or stone image of a Polynesian god. | Unisex | |
| Timothy | honoring God | Male | Greek |
| Tinker | | Unisex | |
| Tinker | | Unisex | |
| Tinker Toy | | Unisex | Hebrew |
| Tiny | Extremely small | Unisex | |