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Family name Rason (Rason , Razón , ระสอน ) , in the world, is quite a rare last name. The last name Rason is habitual in Madagascar, where it is quite a rare surname, the Dominican Republic, where it is a rare surname, and the United Kingdom. Measured by absolute frequency, it most frequently occurs in Madagascar, the United Kingdom, and Thailand. Also, Rason is the forename as well as the last name.