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Cognomen קרוק (Kruk , Kroc , Crook ) , across the world, is a common family name. The family name קרוק is characteristic of Poland, where it is quite a common surname, Isle of Man, and the United Kingdom. In absolute terms, it is commonest in the United States, Poland, and the United Kingdom. Likewise, קרוק is the forename as well as the last name.