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Surname Grassia (Grassia
, Грассиа
) , all around the world, is quite a rare cognomen. The cognomen Grassia is habitual in Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and the United States. Measured by absolute frequency, it is commonest in Italy, the United States, and Brazil. Much less frequently, Grassia is the forename as well as the last name.