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Cognomen Rusk (Rosca , ラスク , Rusk ) , across the world, is a common surname. The last name Rusk is characteristic of Moldova, where it is a common surname, Romania, and Ireland, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Romania, Moldova, and the United States. Much less frequently, Rusk is the forename as well as the last name.