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Cognomen Sahdan (Sahdan , 沙丹 ) , globally, is quite a rare surname. The cognomen Sahdan is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Indonesia. Not in comparison with a country's population, it is commonest in South-eastern Asia, particularly Malaysia, Indonesia, and Philippines. Also, Sahdan is the forename as well as the last name.