| Name | Meaning | Gender | Origin |
|---|
| Regis | kingly | Male | |
| Remington | from the raven's home | Male | English |
| Reuben | Behold a son | Male | Hebrew |
| Rex | after the Rex Banner character in The Simpsons cartoons | Male | Latin |
| Rhianna | Great queen, goddess, nymph | Unisex | Welsh |
| Ribbon | | Unisex | Hebrew |
| Rickey | Powerful, Brave Ruler | Unisex | English |
| Rico | aka Jerico | Male | Spanish |
| Rigby | Lives in the ruler
| Male | English |
| Ringo | apple, peace be with you | Male | English |
| Rio | River
| Male | Spanish |
| Ripley | after the novel and the movie The Talented Mr. Ripley | Male | English |
| River | | Male | |
| Rizla | | Unisex | |
| Rocco | rest | Male | Italian |
| Rocket | To move swiftly and powerfully | Male | Word |
| Rocky | rest | Male | English |
| Rogue | | Male | |
| Rolex | | Unisex | |
| Rolo | Burmese | Unisex | |
| Roo | | Unisex | Hebrew |
| Rootbeer | | Unisex | |
| Roscoe | From the deer forest. | Male | Norse |
| Rowdy | A rough disorderly person. | Male | American |
| Royce | son of the king | Male | English |