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Family name Aua (Aua , อ , Auaa ) , in all the world, is quite a rare last name. The cognomen Aua is characteristic of Aruba, where it is quite a common surname, Papua New Guinea, where it is quite a rare surname, and Estonia. Measured by absolute frequency, the name is most common in Papua New Guinea, Egypt, and Indonesia. Likewise, Aua is the forename as well as the last name.