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Cognomen Gillo (Gill , Gillo , جيلو ) , all over the world, is a widespread last name. The cognomen Gillo is habitual in Latin America and the Caribbean, particularly Barbados, where it is a common surname, Saint Vincent and the Grenadines, and Belize (explore the name in all countries). Measured by absolute frequency, it is commonest in the United States, the United Kingdom, and India. Very seldom, Gillo is the forename as well as the last name.