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Primary media Name Nationality Date
Media FileO.K. Harris Works of Art
Media FileMaud OakesAmericanAmerican, 1903–1990
Media FileViolet OakleyAmericanAmerican, 1874–1961
Media FileHermann OberAustrianAustrian, born 1920
Media FileMary OberingAmericanAmerican, born 1937
Media FileAntoine ObinHaitianHaitian, 1929–1992
Media FileSully ObinHaitianHaitian, 1916–2012
Media FileJohn F. ObuckAmericanAmerican, born 1946
Media FileSewall Oertling
Media FileCharles Z. OffinAmericanAmerican, 1899–1989