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Cognomen Haasen (哈森 , Haasen
) , all over the world, is a rare family name. The family name Haasen is habitual in Western Europe, particularly Netherlands, where it is quite a rare surname, Belgium, where it is a rare surname, and Germany. Measured by absolute frequency, it is commonest in Netherlands, Germany, and Egypt. Very seldom, Haasen is the forename as well as the last name.