O'
O'Carolan, Turlough (9) O'Connor, Mark [Violin] (9) O'Hara, Geoffrey (3) O'Regan, Tarik (2) O'Cahan, Rory Dall (1)
| | OA
Oakley, Herbert Stanley (2)
| | OB
Obradors, Fernando J. (10) Obrecht, Jacob (9) Oboussier, Robert (1)
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OC
Ockeghem, Johannes (21) Octoboni, Johannes (1)
| | OD
Odoyevsky, Vladimir (1)
| | OE
Oesterle, Michael (1) Oestreich, Carl (1)
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OF
Offenbach, Jacques (186)
| | OG
Ogerman, Claus (2) Oginski, Michal Kazimierz (1) Ogarew, Michael (1)
| | OH
Ohana, Maurice (4) Ohki, Masao (1) Ohnaka, Toraji (1) Ohguri, Hiroshi (1) Ohzawa, Hisato (1)
|
OK
Okeover, John (1)
| | OL
Olcott, Chauncey (3) Olsen, Poul Rovsing (2) Oliva, Julio César (2) Olshanetsky, Alexander (2) Oliveri, (2)
| | ON
Onslow, Georges (12)
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OO
Oortmerssen, Jacques van (1)
| | OR
Orff, Carl (67) Ortiz, Diego (19) Orbón, Julian (8) Ord, Boris (4) Ornstein, Leo (4)
| | OS
Oswald von Wolkenstein (5) Osiander, Lucas (2) Oswald, John (2) Osipov, Nikolay (2) Oswald, Henrique (2)
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OT
Ott, David (2) Othmayr, Caspar (1) Otaka, Atsutada (1) Oteo, Alfonso Esparza (1) Otte, Hans (1)
| | OU
Oue, Eiji (1) Ouellette, Antoine (1) Ouseley, F.A. Gore, Sir (1)
| | OV
Ovalle, Jaime (7) Overton, David (1) Ovchinnikov, Vyacheslav (1)
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OW
Owens, Robert (1) Owen, Judith (1) Owen, Richard, Sr. (1)
| | OX
Oxley, Harrison (1)
| | OZ
Ozi, Etienne (1)
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