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Last name Ibar (Ibarra , Ibar , Ybarra ) , around the world, is a widespread surname. The family name Ibar is characteristic of Latin America and the Caribbean, particularly Mexico, where it is a common surname, Paraguay, and Argentina (explore the name in all countries). Not in comparison with a country's population, it is commonest in Mexico, Argentina, and the United States. Much less frequently, Ibar is the forename as well as the last name.