| Name | Meaning | Gender | Origin |
|---|
| Rufus | Red haired | Male | Latin |
| Rugby | rook fortress | Male | English |
| Ruger | | Unisex | |
| Runner | | Unisex | Hebrew |
| Rupert | middle name: Biggles | Male | |
| Rush | red-haired | Male | English |
| Russell | Red as a fox. | Male | |
| Rusty | Covered in rust - a brownish red colour. | Unisex | |
| Ryder | cavalryman, messenger | Male | British |
| Sabastian | Revered | Unisex | English |
| Saber | | Unisex | |
| Sable | A carnivorous mammal of Northern Europe with soft, dark fur. | Female | Animal |
| Sabrina | Legendary princess
| Female | Celtic |
| Sachi | bliss-child; wife of Indra | Unisex | |
| Safari | | Unisex | Hebrew |
| Saffron | A cooking spice | Female | Spice |
| Sage | Aromatic grayish-green herb. Wise or experienced person. | Female | |
| Sahara | the moon . The world's largest desert situated in northern Africa. | Female | Arabic |
| Saint Paw | | Unisex | Hebrew |
| Sake | Alcoholic beverage made from rice. | Unisex | |
| Saladin | peace through faith | Male | Arabic |
| Salem | Peace
| Male | Hebrew |
| Sally | saviour | Female | English |
| Salsa | | Unisex | |
| Sam | to hear | Male | English |