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Family name Arenas (Arenas , أريناس , Аренас ) , around the world, is a widespread surname. The cognomen Arenas is habitual in Latin America and the Caribbean, particularly Colombia, where it is a common surname, Chile, where it is quite a common surname, and Mexico (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Mexico, Colombia, and Philippines. Much less frequently, Arenas is the forename as well as the last name.