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Last name Casula (Casal , Casula , Casulo ) , in the world, is a common cognomen. The cognomen Casula is habitual in Andorra, where it is quite a common surname, Uruguay, and Argentina (explore the name in all countries). Measured by absolute frequency, it is commonest in Italy, Argentina, and Spain. Much less frequently, Casula is the forename as well as the last name.