| Name | Meaning | Gender | Origin |
|---|
| Rock | Italian from German, rest | Male | English |
| Rockford | Rock. | Unisex | English |
| Rocky | rest | Male | English |
| Rubye | | Unisex | |
| Rumi | | Unisex | |
| Sandy | Abbreviation of Alexander defender of man.
| Male | Scottish |
| Saphira | | Unisex | |
| Selenium | | Unisex | Hebrew |
| Shale | | Male | |
| Silver | White
| Male | English |
| Slate | | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Smokey | A grayish blue colour. Slang for highway patrol officer | Male | |
| Snowflake | Single flake or crystal of snow. | Unisex | |
| So | | Unisex | |
| Stain | | Unisex | Hebrew |
| Stanley | Lives by the stony grove
| Male | English |
| Steel | Strong metal alloy made of iron and carbon. Hard unflinching character. | Male | Word |
| Steele | | Unisex | |
| Steinway | | Unisex | Hebrew |
| Stennis | | Unisex | Hebrew |
| Sterling | British money or coin. A type of silver. Of good character. genuine, valued | Male | English |
| Stonewall | | Unisex | Hebrew |
| Stoney | Stone-Lie | Unisex | Greek |