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Surname Hadass (הדס , Hadass ) , globally, is a rare cognomen. The last name Hadass is characteristic of Israel, where it is quite a rare surname, Ethiopia, where it is a rare surname, and Germany, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Ethiopia, Israel, and the United States. More prevalently, Hadass is the forename as well as the last name.