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Surname Castelli (Castelli
, Кастелли
) , in all the world, is a common last name. The cognomen Castelli is characteristic of Italy, where it is quite a common surname, Uruguay, and Argentina (explore the name in all countries). In absolute terms, this name is the most popular in Italy, Argentina, and the United States. Very seldom, Castelli is the forename as well as the last name.