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Cognomen Katz (Katz , カッツ , Кац , and others...) , around the globe, is a common family name. The cognomen Katz is habitual in Israel, where it is a common surname, the United States, where it is quite a rare surname, and Bosnia and Herzegovina. Measured by absolute frequency, it is commonest in the United States, Israel, and Russia. Much less frequently, Katz is the forename as well as the last name.