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Surname Kulk (กุล , Kolk , Kulk ) , around the world, is quite a common cognomen. The family name Kulk is characteristic of Estonia, where it is quite a common surname, Netherlands, and Germany, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Netherlands, Germany, and the United States. Very seldom, Kulk is the forename as well as the last name.