| Name | Meaning | Gender | Origin |
|---|
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Snowball | | Unisex | |
| Snowbell | | Unisex | |
| Socks | Short stockings finishing above the ankle | Unisex | |
| Solomon | Wise and peaceful | Male | Hebrew |
| Sparta | | Unisex | |
| Sphinx | | Unisex | |
| Spot | after Data's cat on Star Trek: The Next Generation | Male | |
| Sprite | Lemonade flavored soft drink. | Male | |
| Stewie | | Unisex | |
| Stubbs | | Unisex | |
| Sylvester | A cartoon cat that tried to eat the bird character Tweety. He was a black and white cat.
| Male | Latin |
| Tabby | | Unisex | |
| Taffy | Sticky candy | Male | Welsh |
| Tama | Jewel | Unisex | Japanese |
| Tefnut | | Unisex | |
| Tiddles | | Unisex | |
| 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 | |
| Tim | Greek, honoring God | Male | Greek |
| Timothy | honoring God | Male | Greek |
| Tom | Bartender at the Leaky Cauldron.
| Male | English |