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Family name Rigas (Rigas , Ригас , ريجاس) , around the globe, is quite a common last name. The surname Rigas is habitual in Greece, where it is quite a common surname, Cyprus, and Qatar, where it is a rare surname. In absolute terms, the name is most common in Greece, the United States, and Cyprus. Much less frequently, Rigas is the forename as well as the last name.