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Cognomen Eliasson (Eliasson , Элиассон, אליאסון ) , throughout the world, is a common surname. The cognomen Eliasson is characteristic of Sweden, where it is quite a common surname, Iceland, and Guinea-Bissau, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Sweden, the United States, and Denmark. Much less frequently, Eliasson is the forename as well as the last name.