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Family name Grassi (Grassi , غراسي , Грасси ) , throughout the world, is a common surname. The last name Grassi is habitual in San Marino, where it is a common surname, Italy, where it is quite a common surname, and Uruguay (explore the name in all countries). Measured by absolute frequency, the name is most common in Italy, Brazil, and Argentina. Very seldom, Grassi is the forename as well as the last name.