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Cognomen Sagy (שגיא , Sagy , Саги ) , in the entire world, is quite a rare surname. The surname Sagy is habitual in Israel, where it is quite a common surname, Egypt, where it is a rare surname, and Australia. Measured by absolute frequency, this name is the most popular in Israel, Egypt, and the United States. More frequently, Sagy is the forename as well as the last name.