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Cognomen Antonini (Antonini , انتوني , Антонини ) , around the world, is a common family name. The cognomen Antonini is characteristic of Italy, where it is quite a common surname, Guernsey, and Switzerland, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Italy, Argentina, and France. Much less frequently, Antonini is the forename as well as the last name.