| 554. Rob Gueringer | Guitar | 1 |
| 554. Rob McCoury | Banjo | 1 |
| 554. Rob Pemberton | Bass, Piano, Vocals | 1 |
| 554. Rob Smoughton | Backing Vocals, Guitar | 1 |
| 554. Rob Stone | Background Vocals, Percussion, Saxophone | 1 |
| 554. Rob Trujillo | Musical Director | 1 |
| 554. Robbie Bennett | Keyboards | 1 |
| 554. Robbie Crowell | Bass | 1 |
| 554. Robbie Elias | Background Vocals | 1 |
| 554. Robbie Kuster | Drums | 1 |
| 554. Robbie McDonald | Guitar | 1 |
| 554. Robby Grant | Mellotron | 1 |
| 554. Robby Takac | Background Vocals, Bass | 1 |
| 554. Robert "Boogie" Bowles | Guitar | 1 |
| 554. Robert "Lord Finesse" Hall (emcee) | Musician | 1 |
| 554. Robert "Sput" Searight | Background Vocals, Drums, Percussion | 1 |
| 554. Robert Ackroyd | Guitar | 1 |
| 554. Robert Burger | Guitar, Keys | 1 |
| 554. Robert Cray | Featured Artist | 1 |
| 554. Robert Dillon | Musician | 1 |
| 554. Robert Ellis | Featured Artist | 1 |
| 554. Robert Glasper Experiment | Featured Artist | 1 |
| 554. Robert Gray (aka Robert Gotobed) | Drums | 1 |
| 554. Robert Hurst | Bass | 1 |
| 554. Robert Johnson | Drums | 1 |