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Cognomen Sigman (Sigman , Сигман, סיגמן ) , worldwide, is quite a rare family name. The cognomen Sigman is habitual in Israel, where it is quite a rare surname, the United States, and Canada, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Philippines, and Israel. Much less frequently, Sigman is the forename as well as the last name.