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Last name Gagliano (Gagliano , Гальяно ) , throughout the world, is a common family name. The cognomen Gagliano is habitual in Italy, where it is quite a common surname, Uruguay, where it is quite a rare surname, and Malta. In absolute terms, the name is most common in Italy, the United States, and Argentina. Much less frequently, Gagliano is the forename as well as the last name.