This sub-category of the 'O' category is for famous people called Oscar.
Oscar Emmanuel Peterson
(1925 - 2007), Canadian jazz pianist and composer. The Oscar Peterson Trio became one of the best-known jazz groups of the 1950s. He released more than 200 recordings and won seven Grammy Awards.
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William Thomas Cosgrave
(1880 - 1965), Irish nationalist politician. In 1922 he became the first president of the Irish Free State.