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Surname Guso (Guso ) , across the world, is a rare last name. The surname Guso is habitual in Bosnia and Herzegovina, where it is quite a common surname, Austria, where it is a rare surname, and Spain, where it is a very rare surname. In absolute terms, it is commonest in Bosnia and Herzegovina, Philippines, and Spain. Very seldom, Guso is the forename as well as the last name.