Last name Арройо (Arroyo 
, Арройо 
) , across the world, is a widespread surname. The last name Арройо is characteristic of Latin America and the Caribbean, particularly Costa Rica, where it is a common surname, Puerto Rico, and Mexico, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Mexico, Peru, and the United States. Much less frequently, Арройо is the forename as well as the last name.