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Last name Blaas (Blaas , بلاس , Блаас ) , throughout the world, is quite a rare family name. The cognomen Blaas is habitual in Western Europe, particularly Austria, where it is quite a rare surname, Netherlands, and Switzerland. Measured by absolute frequency, it most frequently occurs in Netherlands, Germany, and Italy. Very seldom, Blaas is the forename as well as the last name.