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Last name 大屋 (Oya , 大屋 , Оя ) , throughout the world, is a common cognomen. The last name 大屋 is habitual in the Democratic Republic of the Congo, where it is quite a common surname, Ivory Coast, where it is quite a rare surname, and Turkey, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in the Democratic Republic of the Congo, Indonesia, and Turkey. More prevalently, 大屋 is the forename as well as the last name.