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Cognomen Ridolfi (Ridolfi ) , globally, is quite a common last name. The surname Ridolfi is habitual in San Marino, where it is a common surname, Italy, where it is quite a common surname, and Argentina, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Italy, Argentina, and Brazil. Much less frequently, Ridolfi is the forename as well as the last name.