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Last name Polonio (Polonio , Polonius ) , around the globe, is quite a common family name. The surname Polonio is characteristic of Belize, where it is quite a common surname, Portugal, where it is quite a rare surname, and the Dominican Republic. Not in comparison with a country's population, this name is the most popular in Brazil, Philippines, and Spain. Very seldom, Polonio is the forename as well as the last name.