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Around the world, Arenas (Arenas , أريناس , Аренас ) is a rare unisex first name. The first name Arenas is characteristic of Libya, where it is a rare girly name, Colombia, where it is a rare gender-neutral name, and Morocco, where it is a very rare female name. Measured by absolute frequency, it is the most numerous in Colombia, Libya, and China. More prevalently, Arenas is the last name as well as the forename.