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Surname Bonanni (Bonanni , בונני ) , worldwide, is quite a common last name. The cognomen Bonanni is characteristic of Aland Islands, where it is quite a common surname, Italy, and Uruguay, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Italy, the United States, and Argentina. Very seldom, Bonanni is the forename as well as the last name.