- Mary Anne -- Mary Gallagher
- Mary Galvano -- Mary Lou Newmark
- Mary Lou O'Hern -- Mary Stockley
- Mary Stolper -- Marystaple
- Marytez -- Masatsugu Shirai
- Masauko -- Mason Brown
- Mason Caine -- Massiah
- Massiah, Maurice -- Mastelotto
- Master 3d & DJ T -- Masters of English Church Music
- Masters of Funk -- Match & Daddy
- Match Killon -- Mathias Linzatti
- Mathias Malzieu -- Matlock
- Matlock -- Matt Baldwin
- Matt Baldwin -- Matt Edmonds
- Matt Eller -- Matt Kenney & His Western Gentlemen
- Matt Kenny -- Matt Palka
- Matt Palmer -- Matt Thiessen
- Matt Thigpen -- Matthew Arnold
- Matthew "Arvus" Simmons -- Matthew Kirchner
- Matthew Kirkwold -- Matthew Thornton
- Matthew Thrift -- Matti Roots
- Matti Rousi -- Mauk & os Cadillacs Malditos
- Maukai -- Maurice Elwin