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Cognomen יעקובי (Jacoby , Yacobi , Yakobi ) , in all the world, is a common surname. The cognomen יעקובי is characteristic of Israel, where it is quite a common surname, Luxembourg, and Guadeloupe. In absolute terms, it most frequently occurs in the United States, Israel, and Germany. Very seldom, יעקובי is the forename as well as the last name.