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Surname Giuliani (Giuliani , ג'וליאני , Джулиани ) , around the world, is a common cognomen. The family name Giuliani is habitual in Italy, where it is quite a common surname, San Marino, and Argentina, where it is quite a rare surname. In absolute terms, it most frequently occurs in Italy, Argentina, and France. Much less frequently, Giuliani is the forename as well as the last name.