| 596. Omar "O.C." Credle (emcee) | Musician | 1 |
| 596. Omar Alcaide | Bass, Guitar, Synth | 1 |
| 596. Omar Apollo | Vocals | 1 |
| 596. Omar Grand | Keys, Music Director, Piano | 1 |
| 596. Omar Grant | Bass | 1 |
| 596. Omar Lye-Fook | Keys, Vocals | 1 |
| 596. Omar Martinez-Sandoval | Bass | 1 |
| 596. Omar Montes | Vocals | 1 |
| 596. Omar Phillips | Drums | 1 |
| 596. Omar Sosa | Piano | 1 |
| 596. Omar Sosa & Paolo Fresu | Featured Artist | 1 |
| 596. Omar Sosa & Seckou Keita SUBA Trio | Featured Artist | 1 |
| 596. Omara Portuondo | Featured Artist | 1 |
| 596. Omari Forman | Trumpet | 1 |
| 596. Omri Skop | Guitar, Vocals | 1 |
| 596. Onome Edgeworth | Percussion | 1 |
| 596. Opal Hoyt | Vocals | 1 |
| 596. Open Mike Eagle | Sampler, Vocals | 1 |
| 596. Or Bareket | Bass | 1 |
| 596. Orestes Gómez | Percussion | 1 |
| 596. Oriana Aravena | Guitar | 1 |
| 596. Orla Gartland | Floor Tom, Guitar, Piano, Vocals | 1 |
| 596. Orlando Aispuro | Bajo Sexto, Guitars, Keys, Video | 1 |
| 596. Orlando Brinn | Keyboard | 1 |
| 596. Orlando Wells | Viola | 1 |