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Throughout the world, Raio (Raio , Райо , رايو) is a rare dominantly boy's, but uncommonly feminine given name. The given name Raio is characteristic of Bulgaria, where it is a rare male name, Pakistan, where it is a very rare masculine name, and Italy, where it is a very rare feminine name. Not in comparison with a country's population, this name is the most popular in Pakistan, Bulgaria, and Brazil. More prevalently, Raio is the last name as well as the forename.