| Name | Meaning | Gender | Origin |
|---|
| Roux | Red | Male | French |
| Rowan | red-haired; rugged | Male | Scottish |
| Roxy | From Roxanne - Brilliant dawn | Female | English |
| Ruby | Jewel
| Female | Latin |
| Rum | Alcohol distilled from sugar. | Unisex | |
| Russell | Red as a fox. | Male | |
| Rusty | Covered in rust - a brownish red colour. | Unisex | |
| Sable | A carnivorous mammal of Northern Europe with soft, dark fur. | Female | Animal |
| Sandy | Abbreviation of Alexander defender of man.
| Male | Scottish |
| Sausage | Chopped meat stuffed into a prepared casing and cooked. | Unisex | |
| Sheridan | The Wild Man | Male | Irish |
| Sienna | A clay like earthy reddish brown | Female | Italian |
| Skippy | | 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 | |
| Smudge | A blotch or smear | Male | |
| Snicker | | Unisex | Hebrew |
| Snickers | A brand of candy bar. | Unisex | |
| Snickers | A brand of candy bar. | Unisex | |
| Soda | A carbonated water. | Unisex | |
| Sorrel | reddish brown | Male | Botanical |
| Squirrel | | Unisex | |
| Starbuck | Chain of US coffee houses. | Unisex | |
| Starbucks | | Male | |