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Family name Yeshayahu (Yeshayahu , ישעיהו ) , in the entire world, is quite a rare last name. The last name Yeshayahu is habitual in Israel, where it is quite a common surname, Bulgaria, where it is a rare surname, and Greece, where it is a very rare surname. Measured by absolute frequency, the name is most common in Israel, Bulgaria, and Canada. Also, Yeshayahu is the forename as well as the last name.