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Last name Isu (Isu , 椅子 , Ису ) , in the world, is quite a common cognomen. The cognomen Isu is characteristic of Papua New Guinea, where it is quite a rare surname, Nigeria, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Nigeria, India, and Indonesia. Also, Isu is the forename as well as the last name.