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Family name Dyk (Dyk , Дык , ダイク ) , worldwide, is a common cognomen. The cognomen Dyk is habitual in Palestinian Territory, where it is quite a common surname, Namibia, and Lesotho, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Palestinian Territory, South Africa, and Sudan. Very seldom, Dyk is the forename as well as the last name.