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Cognomen Isawa (Isawa , Исава ) , throughout the world, is a rare family name. The family name Isawa is habitual in Jordan, where it is a rare surname, Nigeria, where it is a very rare surname, and Brazil. Not in comparison with a country's population, it most frequently occurs in Nigeria, Brazil, and the United States. More prevalently, Isawa is the forename as well as the last name.