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Cognomen Slater (Slater , Sclater , Слэйтер ) , throughout the world, is a common surname. The cognomen Slater is habitual in Saint Vincent and the Grenadines, where it is quite a common surname, Isle of Man, and the United Kingdom (explore the name in all countries). In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Australia. Very seldom, Slater is the forename as well as the last name.