Composer whose last names start with "O":
- O'boyle, Sean (276)
- O'brien, Francis Patrick (119)
- O'Brien, Michael (6)
- O'brien, Richard (93)
- O'Brien, Tim (3)
- O'carolan, Turlough (125)
- O'Connell, Ryan (1)
- O'connor, Mark (2)
- O'Connor, Sinead (5)
- O'Donnell, Marty (9)
- O'Farrill, Chico (6)
- O'Hara, Geoffrey (28)
- O'hara, Jamie (11)
- O'hern, Michael (29)
- O'Kaine, Rachel Steckler (12)
- O'Keefe, Danny (1)
- O'Leary (1)
- O'Loughlin, Sean (649)
- O'Mara, Peter (17)
- O'Neal, Jamie (4)
- O'Neill, Jackie (7)
- O'Neill, John (92)
- O'neill, Norman (4)
- O'neill, Paul (83)
- O'Regan, Tarik (196)
- O'Reilly, John (586)
- O'sullivan, Donal (1)
- O'Sullivan, Gilbert (21)
- O.A.R. (Of a Revolution), (1)
- Oakeley, Herbert (1)
- Oakes, David (4)
- Oakes, Rodney (8)
- Oakland, Ben (37)
- Oare, Michael (629)
- Oasis (5)
- Oates, John (32)
- Oberdoerffer, Fritz (1)
- Oberleitner, Andreas (1)
- Oberst, Fritz (1)
- Oberthur, Karl (4)
- Obiols, Angel (6)
- Obispo, Pascal (16)
- Obrecht, Jacob (57)
- Obrovska, Jana (7)
- Obst, Michael (5)
- Ocean, Billy (26)
- Ocean, Frank (15)
- Ochs, Klaus (25)
- Ochs, Siegfried (6)
- Ockeghem, Johannes (23)
- Odell, Tom (1)
- Oden, Annette (61)
- Odgren, Jim (5)
- Oehring, Helmut (67)
- Oertzen, Rudolf Von (22)
- Of Monsters and Men, (16)
- Offenbach, Jacques (1200)
- Offspring, The (16)
- Ogawa, Takashi (81)
- Ogden, Nigel (13)
- Ohana, Maurice (89)
- Ohio Players, The (1)
- Ohmae, Satoshi (6)
- Ohrwall, Anders (89)
- Ohse, Reinhard (7)
- Ohta, Herb (2)
- Olatunji, Via (1)
- Olcott, Chauncey (82)
- Olcott, James (14)
- Old Crow Medicine Show, (1)
- Oldfield, Mike (7)
- Oldham, Kevin (10)
- Oldroyd, George (10)
- Oler, Kim (15)
- Oley, Johann Christoph (8)
- Oliva, Jon (6)
- Olivadoti, Joseph (3)
- Olive, Vivienne (81)
- Oliveira, Jamary (1)
- Oliver, Curt (24)
- Oliver, Nancy (3)
- Oliver, Stephen (23)
- Oliver, Sy (36)
- Olivero, Betty (13)
- Olpen, Friedrich W. (102)
- Olsen, Alice (4)
- Olsen, Ole (7)
- Olsen, P. (2)
- Olson, Kevin (183)
- Olson, Lynn Freeman (164)
- Olsson, Hakan (1)
- Olsson, Otto (67)
- Oltra, Manuel (28)
- Omartian, Michael (52)
- Ona, Erik (1)
- Ondrasik, John (73)
- One Direction, (53)
- OneRepublic (7)
- Onna, Peter van (8)
- Ono, Yoko (82)
- Onorati, Henry (91)
- Onslow, George (109)
- Oortmerssen, Jacques van (4)
- Opeth (2)
- Ophee, Matanya (1)
- Ophoven, Hermann (106)
- Oppel, Hans (7)
- Oppenheim, Tony (2)
- Opperman, Kalmen (15)
- Orban, Gyorgy (54)
- Orbison, Roy (135)
- Orbon, Julian (7)
- Orchestra, Mahavishnu (1)
- Orchestra, The (1)
- Orcino, Len (54)
- Ore, Cecilie (2)
- Orff, Carl (412)
- Orff-Willert, Gertrud (1)
- Orgad, Ben-Zion (20)
- Organ, Anne Krentz (39)
- Orland, Henry (11)
- Ornadel, Cyril (4)
- Ornstein, Leo (8)
- Orologio, Alessandro (16)
- Orozco, Felipe (6)
- Orr, Bud (4)
- Orr, Buxton (9)
- Orrall, Robert Ellis (12)
- Orrego-Salas, Juan (112)
- Orrel, Max (81)
- Orrell, Sue (1)
- Orrico, Stacie (9)
- Ortega, Fernando (4)
- Ortega, Miquel (9)
- Orthel, Leon (7)
- Ortiz, Diego (43)
- Ortolani, Riz (24)
- Orton, Beth (2)
- Osborn, Kristyn (11)
- Osborne (4)
- Osborne, Charles (7)
- Osborne, Chester G. (1)
- Osborne, Jeffrey (9)
- Osborne, Sonny (2)
- Osborne, Willson (8)
- Osbourne, Ozzy (198)
- Oscheit, Max (5)
- Osgood, Charles (3)
- Osieck, Hans (4)
- Oslin, K.T. (1)
- Osmon, Leroy (140)
- Osmond, Donny (5)
- Ospald, Klaus (4)
- Osse, Klaus (1)
- Ostendorf, Jens-Peter (3)
- Osterling, Eric (146)
- Ostling, Acton E. (16)
- Oswald, Henrique (4)
- Otero, Francisco (1)
- Othegraven, August von (16)
- Othmayer, Caspar (2)
- Othmayr, Caspar (24)
- Otis, Clyde (17)
- Ott, David (36)
- Otte (4)
- Otten, Ludwig (13)
- Otterstedt, Annette (1)
- Ottner, Carmen (5)
- Otto, James (5)
- Our Lady Peace (3)
- Ourkouzounov, Atanas (150)
- Ovanin, Nikola (10)
- Overstreet, Paul (82)
- Overthrow, David (18)
- Overton, Hall (2)
- Owen, Chuck (29)
- Owen, Jake (7)
- Owen, Steve (20)
- Owen, William (7)
- Owens (20)
- Owens, Buck (20)
- Owens, Carol (1)
- Owens, Ginny (8)
- Owens, Jimmy (42)
- Owens, Rebecca Kleintop (3)
- Owens, Sam Batt (60)
- Owens, Terry (5)
- Owens, William (337)
- Owl City, (2)
- Owolabi, Kola (1)
- Oxford (4)
- Oxley, Harrison (13)
- Oyens, Tera de Marez (24)
- Ozi, Etienne (28)
- Ozim, Igor (1)
