| Name | Meaning | Gender | Origin |
|---|
| Sonic | Approaching the speed of sound, fast-paced | Unisex | |
| Sonya | Loud.
| Female | |
| Sophie | Wisdom. Variant of Sophia
| Female | |
| Sora | Chirping Songbird | Unisex | Native American |
| Sorcha | bright, shining | Female | Irish |
| Spock | | Unisex | |
| Sputnik | | Unisex | Hebrew |
| Stewie | | Unisex | |
| Tabitha | gazelle, roe-buck | Female | Aramaic |
| Taylor | A tailor
| Female | English |
| Techno | | Unisex | |
| Teddy | From Edward - Prosperous guardian | Unisex | |
| Temperance | | Female | |
| Tessa | Abbreviation of Teresa which is a popular saint's name of uncertain meaning.
| Female | English |
| Thalia | blooming, plentiful | Female | Greek |
| Thelma | nursing | Female | Literary |
| Thing | An entity or idea having it's own existence. | Unisex | |
| Timmy | From Timothy - Honoring God | Unisex | |
| Topanga | from the sitcom Boy Meets World | Female | Native |
| Toshiro | | Unisex | |
| Toto | | Unisex | |
| Tron | | Unisex | Hebrew |
| Tyr | Viking mythology: the god of war | Unisex | |
| Unity | Together
| Female | English |
| Ursula | little female bear | Female | Latin |