O'Hara and Laffey
Artist with "For Hysterical Porpoises Only" album

O'Hara, Laffey & Furlong
Artist with "Old Shoes" album

O'Hardy Music
Artist with "Spanische Romanzen und Flamenco I" album

O'harety 05
Artist with "Qualmless Records Presents" album

O'Henry
Artist with the following albums: "Katedra filantromatematiky a jine povidky", "Katedra filantromatematiky a jine povidky 2"

O'Hooley & Tidow
Artist with the following albums: "Silent June", "The Fragile"

O'Hooligans
Artist with the following albums: "South of the strait", "Darjeeling Tea"

O'Hora, Tony
Artist with "Escape Into The Sun" album