| Abbreviation | Definition |
|---|---|
| RDP | Richard David Preston |
| REH | Robert E. Howard |
| REKHA | Rekha |
| REKHA | Rekha Vedavyas |
| REL | Robert Edward Lee |
| REO | Ransom Eli Olds |
| RF | Robert Frost |
| RFK | Robert Francis Kennedy |
| RG | Rajiv Gandhi |
| RG | Reginald Grundy |
| RG | Richie Ginther |
| RG | Robert Golden |
| RG | Robert Grant |
| RG | Roberto Gucci |
| RG | Rufus Grey |
| RG | Russ Gibb |
| RGJ | Robert G. Johnson |
| RH | Ray Hine, P-38 pilot |
| RH | Rich Herrick |
| RH | Richard Hoffmann |