| Name | Meaning | Gender | Origin |
|---|
| Sugar | A sweet powder from sugar cane. Slang for sweetheart. | Female | English |
| Sundance | | Unisex | Hebrew |
| Sunday | 7th day of the week | Unisex | English |
| Sunshine | Light from the sun | Unisex | English |
| Susie | Lily | Female | Hebrew |
| Suzy | Lily | Female | Hebrew |
| Sweetie | Sweetheart. | Unisex | English |
| Sweetie-pie | | Unisex | Hebrew |
| Sydney | Wide meadow | Female | English |
| Taco | A folded fried tortilla filled with meat, cheese and spices. | Unisex | English |
| Taffy | Beloved | Female | Welsh |
| Talia | Dew of God | Female | Hebrew |
| Tammy | Twin | Female | Aramaic |
| Tango | | Unisex | Hebrew |
| Tank | A large metal container. A heavily armed combat vehicle | Unisex | English |
| Tara | Crag | Female | Gaelic |
| Tasha | (Christ's) birthday | Female | Latin |
| Taylor | A tailor | Female | English |
| Taz | Wild Animal, Thrid Born | Unisex | American |
| T-bone | A thick steak containing a T shaped bone. | Unisex | English |
| Tequila | An alcoholic liquor distilled from mescal. | Unisex | English |
| Tess | Harvester | Female | Greek |
| Tessa | Harvester | Female | Greek |
| Tex | Of Texas | Unisex | English |
| Thelma | Will | Female | Literary |
| Thumper | To walk with heavy steps | Unisex | English |
| Thunder | Stormy Tempered | Unisex | English |
| Tiger | Tiger | Unisex | English |
| Tigger | From Winnie the Pooh | Unisex | English |
| Tiki | Maori figure representing an ancestor. A wooden or stone image of a Polynesian god. | Unisex | English |