| Name | Meaning | Gender | Origin |
|---|
| Rawhide | | Unisex | Hebrew |
| Ray | kingly | Male | English |
| Red | A primary colour resembling the colour of blood | Male | Color |
| Reese | ardor | Female | Welsh |
| Rita | pearl, precious | Female | English |
| Rojo | Red. Rojo for males and Raja for females. | Male | Spanish |
| Rory | aka Rors | Male | Irish |
| Rose | Flower
| Female | Latin |
| Rowena | White haired
| Female | Welsh |
| Roxy | From Roxanne - Brilliant dawn | Female | English |
| Ruby | Jewel
| Female | Latin |
| Rudy | From Rudolph - Famous wolf | Male | |
| Rufus | Red haired | Male | Latin |
| Rum | Alcohol distilled from sugar. | Unisex | |
| Rusty | Covered in rust - a brownish red colour. | Unisex | |
| Sable | A carnivorous mammal of Northern Europe with soft, dark fur. | Female | Animal |
| Sabrina | Legendary princess
| Female | Celtic |
| Sadie | Princess
| Female | English |
| 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 |
| Salmon | salmon, a fish | Male | Animal |
| Sammy | Hebrew, told by God | Male | English |
| Sandy | Abbreviation of Alexander defender of man.
| Male | Scottish |
| Sassy | Lively and spirited | Female | |