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Family name Idalgo (Idalgo
) , all around the world, is quite a rare cognomen. The cognomen Idalgo is characteristic of Latin America and the Caribbean, particularly the Dominican Republic, where it is quite a rare surname, Guatemala, and Argentina. Not in comparison with a country's population, it is commonest in Latin America and the Caribbean, particularly Brazil, Argentina, and Guatemala. Much less frequently, Idalgo is the forename as well as the last name.