| Name | Meaning | Gender | Origin |
|---|
| Siri | fair victory | Female | Norse |
| Skye | sky, sheltering | Female | Scottish |
| Skylar | eternal life, strength, love and beauty | Female | Spelling |
| Susan | Lily Diminutive of Susannah also used as an independent name. In the apocryphal Book of Tobit Susannah courageously defended herself against wrongful accusation. White lilies grew in the Biblical city of Susa in Persia.
| Female | Hebrew |
| Susanna | lily | Female | Hebrew |
| Sydney | from city of St. Denis | Female | |
| Tamsin | twin | Female | English |
| Tara | A hill where the kings met
| Female | Irish |
| Tash | born on Christmas Day | Female | English |
| Tasha | Russian diminutive of Natalya, birthday of the Lord | Female | English |
| Taylor | A tailor
| Female | English |
| Tegan | doe | Unisex | |
| Tess | fourth born | Female | English |
| Tessa | Abbreviation of Teresa which is a popular saint's name of uncertain meaning.
| Female | English |
| Thea | goddess, sort | Female | Greek |
| Trinity | Three divine persons, The Father, The Son and The Holy Spirit. | Female | Latin |
| Tris | | Unisex | Hebrew |
| Ula | Abbreviation of Eulalie
| Female | Celtic |
| Ulla | Has willpower
| Female | Norse |
| Uma | after the actress Uma Thurman | Female | Sanskrit |
| Umi | Mother | Unisex | Italian |
| Una | One.
| Female | Latin |
| Ursa | Form of Ursula | Female | Greek |
| Valentina | healthy, strong | Female | Latin |
| Valerie | valor, strong | Female | |