| 544. Marcus Jones | Drums | 1 |
| 544. Marcus Machado | Guitar | 1 |
| 544. Marcus Machado (guitar) | Musician | 1 |
| 544. Marcus Paul | Trumpet | 1 |
| 544. Marcus Phillips | Bass, Keys | 1 |
| 544. Marcus Reddick | Bass | 1 |
| 544. Marcus Semaj | Vocals | 1 |
| 544. Marcus Strickland | Bass Clarinet, Tenor Sax | 1 |
| 544. Marcus Sugg | Vocals | 1 |
| 544. Marcus Tenney | Trumpet | 1 |
| 544. Margaret Glaspy | Featured Artist | 1 |
| 544. Margaux Bouchegnies | Electric Bass | 1 |
| 544. Margo Price | Guitar, Vocals | 1 |
| 544. Margo Price & Jeremy Ivey | Featured Artist | 1 |
| 544. Mari Estrada | Vocals | 1 |
| 544. Maria Castro | Background Vocals, Drum Kit | 1 |
| 544. Maria Christina Jasmin Kopp | Background Vocals | 1 |
| 544. Maria Gadú | Vocals | 1 |
| 544. Maria Reis | Background Vocals, Keys | 1 |
| 544. Maria Taylor | Featured Artist | 1 |
| 544. Maria Telesheva | Accordion | 1 |
| 544. Maria Volonte | Featured Artist | 1 |
| 544. Mariachi El Bronx | Featured Artist | 1 |
| 544. Mariachi Flor De Toloache | Featured Artist | 1 |
| 544. Mariah Meshae | Background Vocals | 1 |