Ooijman Remco
Oomori Tetsuro
Ooya Koichi
Ooyabu Hirokazu
Opitz Bernhard
Orange Musical Industries Limited
Orberk Omer Fatih
Organvidez Juan Humberto
Orne Laurence E.
Orr Jerry
Orser David John
Ortiz Jeff
Osika David M.
Oswal Sandeep Kesrimal
Ota Yorito
Otake Kan
Otala Matti N.
Otao Kazumasa
Otsuki Takashi
Owen Brian