| Name | Meaning | Gender | Origin |
|---|
| Russell | Red as a fox. | Male | |
| Sagan | | Unisex | Hebrew |
| Sashi | Moonbeam | Unisex | Hindu |
| Saturn | Sixth and second largest planet away from the Sun. | Male | |
| Scott | from Scotland | Male | English |
| Selene | after the Greek godess of the moon | Unisex | |
| Seren | for Serendipidity | Male | Welsh |
| Sirius | burning | Male | Latin |
| Skat | | Unisex | Hebrew |
| Skywalker | | Unisex | Hebrew |
| Solar | | Unisex | Hebrew |
| Spock | | Unisex | |
| Sputnik | | Unisex | Hebrew |
| Starbuck | Chain of US coffee houses. | Unisex | |
| Starla | Star-Like | Unisex | English |
| Sterling | British money or coin. A type of silver. Of good character. genuine, valued | Male | English |
| Sunny | Abounding in sunshine, cheerful | Male | Nickname |
| Taurus | bull | Male | Latin |
| Tex | Of Texas | Male | English |
| Titan | | Male | |
| Titus | of the giants | Male | Latin |
| Tracy | path, road | Male | |
| Triton | after Neptune's moon | Unisex | |
| Twyla | | Unisex | |
| Uhura | after the female character in Star Trek | Unisex | |