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Surname Herro (Herro ) , across the world, is quite a rare last name. The cognomen Herro is characteristic of Lebanon, where it is quite a common surname, Myanmar, where it is quite a rare surname, and Argentina, where it is a rare surname. Not in comparison with a country's population, the name is most common in Myanmar, Lebanon, and the United States. Also, Herro is the forename as well as the last name.