| Name | Meaning | Gender | Origin |
|---|
| Red | A primary colour resembling the colour of blood | Male | Color |
| Regis | kingly | Male | |
| Rema | | Unisex | Hebrew |
| Rhodes | dweller by the crosses; roses | Male | Greek |
| Ripley | after the novel and the movie The Talented Mr. Ripley | Male | English |
| River | | Male | |
| Robert | Famed: bright: shining. 14th-century King Robert the Bruce. Robert Burns the poet.
| Male | English |
| Rochester | rock fortress | Male | English |
| Rock | Italian from German, rest | Male | English |
| Rocker | | Unisex | Hebrew |
| Rockford | Rock. | Unisex | English |
| Rocky | rest | Male | English |
| Rogers | | Unisex | |
| Ronan | a pledge | Male | Irish |
| Roosevelt | rose field | Male | Dutch |
| Roscoe | From the deer forest. | Male | Norse |
| Rosebud | | Unisex | Hebrew |
| Ross | from the TV sitcom Friends | Male | Scottish |
| Roy | regal one, Red haired | Male | |
| Royal | kingly, royal | Male | |
| Rudyard | from the red gate | Male | English |
| Ruger | | Unisex | |
| Rumble | | Unisex | |
| Russell | Red as a fox. | Male | |
| Sagebrush | | Unisex | Hebrew |