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Family name Frenkel (Frenkel , Френкель , פרנקל ) , in the world, is a common cognomen. The cognomen Frenkel is characteristic of Israel, where it is quite a common surname, Belarus, where it is quite a rare surname, and Russia. In absolute terms, it is the most numerous in Israel, Russia, and the United States. Much less frequently, Frenkel is the forename as well as the last name.