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Family name Gyamtso (Gyamtso ) , in the world, is a rare surname. The last name Gyamtso is habitual in Nepal, where it is a rare surname, Canada, where it is a very rare surname, and France, where it is an extremely rare surname. In absolute terms, it is commonest in Nepal, India, and China. More frequently, Gyamtso is the forename as well as the last name.