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Surname ممنون (Mamnun , Mamnoon , ممنون ) , around the world, is quite a rare last name. The cognomen ممنون is characteristic of Southern Asia, particularly Iran, where it is a rare surname, Afghanistan, and Bangladesh. Not in comparison with a country's population, it is commonest in Southern Asia, particularly Bangladesh, Iran, and India. Likewise, ممنون is the forename as well as the last name.