| Name | Meaning | Gender | Origin |
|---|
| Sunflower | | Unisex | |
| Sunlight | | Unisex | |
| Sunny | Abounding in sunshine, cheerful | Male | Nickname |
| Sunrise | | Unisex | |
| Sunset | Daily disappearance of the sun below the horizon. Usually red, yellow or orange in colour. | Unisex | |
| Sunshine | Rays from the sun. Cheerfulness | Female | Word |
| Swan | | Unisex | Hebrew |
| Sylvia | from the forest | Female | Latin |
| Tahoe | edge of the lake | Male | Native |
| Tansy | immortality, flower name | Female | Greek |
| Tarragon | | Female | |
| Taurus | bull | Male | Latin |
| Teal | Bluish Green Color | Male | English |
| Tempest | storm | Female | Word |
| Terra | earth | Female | Latin |
| Thicket | | Unisex | |
| Thistle | thistle | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thunder | Sound produced from lightning | Unisex | |
| Thyme | | Female | Hebrew |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger | A large, striped, carnivorous mammal from Asia. | Male | Animal |
| Tiger Lilly | | Unisex | |
| Tigerlily | | Unisex | |