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Family name Smets (Smets , Сметс ) , in the entire world, is a common last name. The surname Smets is habitual in Belgium, where it is quite a common surname, Aland Islands, and Belize, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Western Europe, particularly Belgium, Netherlands, and Germany. Very seldom, Smets is the forename as well as the last name.