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Cognomen Dello (Dello , Делло ) , in all the world, is a common last name. The cognomen Dello is characteristic of Italy, where it is quite a rare surname, the Democratic Republic of the Congo, and Estonia. Not in comparison with a country's population, this name is the most popular in the Democratic Republic of the Congo, Italy, and Philippines. Much less frequently, Dello is the forename as well as the last name.