| 598. Robert "Lord Finesse" Hall (emcee) | Musician | 1 |
| 598. Robert "Sput" Searight | Background Vocals, Drums, Percussion | 1 |
| 598. Robert Ackroyd | Guitar | 1 |
| 598. Robert Burger | Guitar, Keys | 1 |
| 598. Robert Cray | Featured Artist | 1 |
| 598. Robert Dillon | Musician | 1 |
| 598. Robert Ellis | Featured Artist | 1 |
| 598. Robert Glasper Experiment | Featured Artist | 1 |
| 598. Robert Gray (aka Robert Gotobed) | Drums | 1 |
| 598. Robert Hurst | Bass | 1 |
| 598. Robert Johnson | Drums | 1 |
| 598. Robert Kearns | Bass | 1 |
| 598. Robert Plant and Alison Krauss | Featured Artist | 1 |
| 598. Robert Stillman | Saxophone | 1 |
| 598. Robert Taylor | Drums | 1 |
| 598. Roberta Leono | Tambor Alegre | 1 |
| 598. Roberto Fonseca | Piano | 1 |
| 598. Roberto Lange | Guitar, Vocals | 1 |
| 598. Roberto Lorenzo | Trombone | 1 |
| 598. Roberto Verástegui | Arrangements, Keys, Piano | 1 |
| 598. Roberto Vizcaino Jr. | Percussion | 1 |
| 598. Roberts | Violin | 1 |
| 598. Robin Baytas | Drums | 1 |
| 598. Robin Bramlett | Bass | 1 |
| 598. Robin Dann | Vocals | 1 |