| Name | Meaning | Gender | Origin |
|---|
| Rogue | | Male | |
| Romeo | pilgrim to Rome | Male | Italian |
| Rory | aka Rors | Male | Irish |
| Roux | Red | Male | French |
| Rudy | From Rudolph - Famous wolf | Male | |
| Rufus | Red haired | Male | Latin |
| Rush | red-haired | Male | English |
| Rusty | Covered in rust - a brownish red colour. | Unisex | |
| Ruthie | aka Baby Ruth | Unisex | |
| Ryder | cavalryman, messenger | Male | British |
| Sam | to hear | Male | English |
| Sammy | Hebrew, told by God | Male | English |
| Samson | Bright sun
| Male | Hebrew |
| Sandy | Abbreviation of Alexander defender of man.
| Male | Scottish |
| Satan | The Devil and adversary of God | Male | |
| Saturn | Sixth and second largest planet away from the Sun. | Male | |
| Scout | One dispatched from main body to gather information | Male | Word |
| Selene | after the Greek godess of the moon | Unisex | |
| Shredder | | Unisex | Hebrew |
| Simba | from The Lion King | Male | Swahili |
| Simba | lion | Male | Swahili |
| Simon | he who hears | Male | Hebrew |
| Skyler | Dutch, scholar | Male | Spelling |
| Slater | maker of slates | Male | English |
| Smoky | | Unisex | |