| Name | Meaning | Gender | Origin |
|---|
| Rascal | One that is playfully mischievous | Male | |
| Reba | From Rebecca - The captivator | Female | Hebrew |
| Riley | courageous | Female | Irish |
| Rocky | rest | Male | English |
| Rogue | | Male | |
| Rosie | From Rose - The most beautiful of flowers | Female | English |
| Roxy | From Roxanne - Brilliant dawn | Female | English |
| Ruby | Jewel
| Female | Latin |
| Rudy | From Rudolph - Famous wolf | Male | |
| Rufus | Red haired | Male | Latin |
| Rusty | Covered in rust - a brownish red colour. | Unisex | |
| Sadie | Princess
| Female | English |
| 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 |
| Sasha | defending men | Female | Russian |
| Sassy | Lively and spirited | Female | |
| Scout | One dispatched from main body to gather information | Male | Word |
| Shadow | A rough, dark image cast by an object blocking the sun's rays | Female | English |
| Sheba | from Sheba | Female | Hebrew |
| Shorty | Of less than average size | Unisex | |
| Simba | lion | Male | Swahili |
| Simba | from The Lion King | Male | Swahili |
| Smoky | | Unisex | |