| Name | Meaning | Gender | Origin |
|---|
| Presley | priest's meadow | Unisex | |
| Ra | sun | Male | Egyptian |
| Ramses | son of God | Male | Egyptian |
| Rebel | One that resists of defies authority | Male | Word |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Rhett | Enthusiastic, stream.
| Male | English |
| Rip | ripe, full grown | Male | Dutch |
| Rocket | To move swiftly and powerfully | Male | Word |
| Rocky | rest | Male | English |
| Roland | from the famous land | Male | |
| Romeo | pilgrim to Rome | Male | Italian |
| Roz | Rose | Female | Polish |
| Sable | A carnivorous mammal of Northern Europe with soft, dark fur. | Female | Animal |
| Sadie | Princess
| Female | English |
| Salty | | Unisex | Hebrew |
| Sam | to hear | Male | English |
| Sapien | | Unisex | |
| Sasquatch | has extra toes and hence is a bigfoot | Unisex | |
| Sassy | Lively and spirited | Female | |
| Savage | | Unisex | Hebrew |
| Sawyer | woodsman | Male | English |
| Saxon | people of the dagger | Male | |
| Seth | The appointed by God | Male | Hebrew |
| Shadow | A rough, dark image cast by an object blocking the sun's rays | Female | English |
| Shana | Yiddish for princess | Female | English |