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Cognomen Montero (Montero , Монтеро , モンテロ) , around the world, is a widespread surname. The surname Montero is characteristic of Latin America and the Caribbean, particularly Costa Rica, where it is a widespread surname, the Dominican Republic, and Panama, where it is a common surname (explore the name in all countries). Measured by absolute frequency, it is the most numerous in the Dominican Republic, Mexico, and Philippines. Much less frequently, Montero is the forename as well as the last name.