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Family name Gajos (Gajos , Гайос , Гажос ) , in the entire world, is quite a rare last name. The surname Gajos is habitual in Poland, where it is quite a rare surname, Austria, where it is a rare surname, and Armenia. In absolute terms, this name is the most popular in Poland, the United States, and Germany. Also, Gajos is the forename as well as the last name.