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Family name אלסו (Alesso , Alsou , אלסו ) , around the globe, is quite a rare cognomen. The last name אלסו is characteristic of Argentina, where it is quite a rare surname, Italy, and Colombia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Argentina, Italy, and the United States. Much less frequently, אלסו is the forename as well as the last name.