| Abbreviation | Definition |
|---|---|
| RL | Robert Long |
| RLB | Robert Leroy Boyle |
| RLJ | Rickie Lee Jones |
| RLR | Robert Lyon Rasner |
| RLS | Robert Lee Studebaker, Dallas Police Officer present at the Kennedy Assassination |
| RLS | Robert Louis Stevenson |
| RLV | Richard L. Venezky |
| RM | Randy Morris |
| RM | Remy Martin |
| RM | Rich Muller |
| RM | Rob Mullins |
| RM | Rob Myers |
| RM | Robbie Miranda |
| RM | Robert Mendralla |
| RM | Roger Mcguinn |
| RMH | Roh Moo–hyun, former President of South Korea |
| RMS | Richard Matthew Stallman, activist |
| RN | Randy Newman, singer and composer |
| RN | Richard Nixon |
| RNH | Rodgers & Hammerstein |