In the Avestā, Thraetaona is the son of Aθβiya, and so is called Āθβiyāni, meaning from the family of Aθβiya. Originally, he may have been recorded as the killer of the dragon Zahhak (Aži Dahāk), but in Middle Persian texts, Dahāka/Dahāg is instead imprisoned on Mount Damavand in Amol.