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Cognomen Kolk (Kolk , Колк , Кольк ) , across the world, is quite a common family name. The last name Kolk is habitual in Estonia, where it is quite a common surname, Netherlands, and Germany, where it is quite a rare surname. In absolute terms, the name is most common in Netherlands, Germany, and the United States. Very seldom, Kolk is the forename as well as the last name.