| Name | Meaning | Gender | Origin |
|---|
| Rogue | | Male | |
| Roman | citizen of Rome | Male | Latin |
| Romeo | pilgrim to Rome | Male | Italian |
| Ronan | a pledge | Male | Irish |
| Rowdy | A rough disorderly person. | Male | American |
| Ryder | cavalryman, messenger | Male | British |
| Sailor | One who serves in the navy or works on a ship. | Male | Occupational |
| Sampson | sun | Male | Hebrew |
| Samson | Bright sun
| Male | Hebrew |
| Samuel | his name is God | Male | Hebrew |
| Sargent | officer, to serve | Male | Spelling |
| Sawyer | woodsman | Male | English |
| Saxon | people of the dagger | Male | |
| Sebastian | An august person | Male | Latin |
| Selene | after the Greek godess of the moon | Unisex | |
| Seth | The appointed by God | Male | Hebrew |
| Shaft | | Unisex | |
| Shaggy | Bushy and matted (hair), unkempt. | Unisex | |
| Shooter | Waylon Jennings' Sons Name Is Shooter. | Male | User Contributed |
| Skyler | Dutch, scholar | Male | Spelling |
| Sniper | A skilled shooter who spots targets from a concealed place. | Unisex | |
| Spencer | Shopkeeper, dispenser, keeper | Male | English |
| Spike | A long, thick sharp-pointed piece of wood or metal | Male | American |
| Stalin | | Unisex | Hebrew |
| Starbuck | Chain of US coffee houses. | Unisex | |