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Last name Arroba (ربع , Arroba , Arobe ) , around the world, is quite a rare surname. The surname Arroba is characteristic of Palestinian Territory, where it is quite a rare surname, Libya, and Egypt, where it is a rare surname. Not in comparison with a country's population, the name is most common in Egypt, Sudan, and Palestinian Territory. Also, Arroba is the forename as well as the last name.