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Cognomen יארוש (Jaross , יארוש ) , around the world, is a rare family name. The cognomen יארוש is characteristic of Latvia, where it is quite a rare surname, Hungary, where it is a rare surname, and Israel. In absolute terms, the name is most common in the United States, Latvia, and Hungary. Much less frequently, יארוש is the forename as well as the last name.