Achiacharus is mentioned only once in the Vulgate version of Tobias (11:20, under the form Achior), but the name occurs four times in the Greek versions. He is represented as a nephew of Tobias, and an influential minister of the Assyrian King Esarhaddon (681-668 B.C.). On the relation, supposed by some critics, of this personage to Ahiakar the Wise, of eastern legend, see E. Cosquin, in Revue biblique Internationale, 1899, 50 sq.