| Name | Meaning | Gender | Origin |
|---|
| Rina | Pet form of names in -rina | Female | English |
| Rocket | To move swiftly and powerfully | Unisex | English |
| Rogue | | Unisex | Hebrew |
| Romy | Sea dew | Unisex | Latin |
| Rorschach | | Unisex | Hebrew |
| Rosie | Rose | Female | Latin |
| Roxanne | Star | Female | Persian |
| Roxey | | Unisex | Hebrew |
| Roxie | Star | Unisex | Persian |
| Roxy | Star | Female | Persian |
| Ruby | Red | Female | Latin |
| Rue | Fame | Female | German |
| Rusty | Rusty, full of rust | Unisex | American English |
| Sable | Sable (black) | Unisex | English |
| Sabre | | Unisex | Hebrew |
| Sadie | Princess | Female | Hebrew |
| Salem | Secure, peace | Unisex | Arabic |
| Samantha | Listener | Female | Aramaic |
| Sammy | His name is God | Unisex | Hebrew |
| Sampson | Sun | Unisex | Hebrew |
| Sara | Princess | Female | Hebrew |
| Sarge | Noncommissioned Army or Air Force rank | Unisex | English |
| Sasha | Defending men | Unisex | Greek |
| Sassy | Lively and spirited | Unisex | English |
| Satan | The Devil and adversary of God | Unisex | English |
| Satin | Amber | Female | Armenian |
| Saturn | Sixth and second largest planet away from the Sun. | Unisex | English |
| Sauda | Dark and beautiful | Female | Swahili |
| Saxon | Sharp blade | Female | German |
| Scamp | A mischievous youngster | Unisex | English |