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Last name Γρύλλος (Grill , Grilo , Greier ) , around the world, is a common surname. The last name Γρύλλος is characteristic of Portugal, where it is quite a common surname, Austria, and Luxembourg, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Portugal, Brazil, and Germany. Much less frequently, Γρύλλος is the forename as well as the last name.