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Surname Cassini (Cassini
, カッシーニ
, كاسيني) , all around the world, is quite a common last name. The family name Cassini is characteristic of Reunion, where it is quite a common surname, Italy, where it is quite a rare surname, and Argentina. Measured by absolute frequency, it is the most numerous in Italy, Brazil, and Argentina. Much less frequently, Cassini is the forename as well as the last name.