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Family name Plier (Piler , Plia , Plier ) , throughout the world, is a rare last name. The family name Plier is habitual in Luxembourg, where it is quite a rare surname, Croatia, and Czechia, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in the United States, Brazil, and France. Much less frequently, Plier is the forename as well as the last name.