| Name | Meaning | Gender | Origin |
|---|
| Sunil | Dark blue | Male | Sanskrit |
| Sunila | Dark blue | Female | Indian |
| Sunny | Filled with sunlight | Male | English |
| Sunshine | Light from the sun | Unisex | English |
| Susana | Lily | Female | Hebrew |
| Susanna | Lily | Female | Hebrew |
| Susie | Lily | Female | Hebrew |
| Suvarna | Beautiful color | Female | Sanskrit |
| Suzanne | Lily | Female | Hebrew |
| Suzette | Lily | Female | Hebrew |
| Suzy | Lily | Female | Hebrew |
| Taja | Crown | Female | Sanskrit |
| Tale | Green | Female | African |
| Tan | New, Chastity | Male | English |
| Tanner | Tanner | Male | English |
| Tawana | Tan Hide | Female | Native American |
| Tawnie | A Green Field: The Warm Sandy Color Of A Lion's Coat. | Female | English |
| Tawny | Tawny, tanned | Female | English |
| Teal | The Bird Teal: Also The Blue-Green Color. | Unisex | English |
| Teddy | Gift of God | Male | Greek |
| Tequila | An alcoholic liquor distilled from mescal. | Unisex | English |
| Terra | Earth, soil | Female | Latin |
| Thanh | Bright, clear blue | Male | Vietnamese |
| Thistle | Thistle | Female | 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 |
| Timber | Wood used as a building material. Also timber-wolf. | Unisex | English |
| Titian | Red-gold | Female | Latin |
| Toast | | Unisex | Hebrew |