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Cognomen Agnero (Agnero ) , in the world, is quite a rare family name. The cognomen Agnero is habitual in Ivory Coast, where it is quite a common surname, France, where it is a rare surname, and Italy, where it is a very rare surname. Measured by absolute frequency, it is commonest in Ivory Coast, France, and the United States. Very seldom, Agnero is the forename as well as the last name.