| Name | Meaning | Gender | Origin |
|---|
| Styx | from Greek mythology, the river that formed the boundary between earth and the underworld | Unisex | |
| Sunflower | | Unisex | |
| Sushi | Raw fish. | Unisex | |
| Sushi | Raw fish. | Unisex | |
| Sweet | | Unisex | Hebrew |
| Swift | | Unisex | |
| Tabby | | Unisex | |
| Talker | | Unisex | Hebrew |
| Tangelo | Orange coloured citrus fruit. | Unisex | |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | |
| Tao | Philosophy and religion of China. | Unisex | |
| Tefnut | | Unisex | |
| Thai | | Unisex | |
| Thai | | Unisex | |
| Thug | | Unisex | Hebrew |
| Thumper | To walk with heavy steps | Unisex | |
| TICA | | Unisex | Hebrew |
| Tigger | from Winnie the Pooh | Unisex | |
| Tiki | Maori figure representing an ancestor. A wooden or stone image of a Polynesian god. | Unisex | |
| Tinkerbell | | Unisex | |
| Tinkertoy | | Unisex | Hebrew |
| Tiny | Extremely small | Unisex | |
| Toad | Amphibian related to frogs, with a broader body and rougher skin. | Unisex | |
| Tomato | | Unisex | |
| Tourmaline | | Unisex | Hebrew |