Balash (in the Greek authors, Balas; the later form of the name Vologases), the eighteenth Sassanid King of Persia (484-488), was the brother and successor of Peroz I of Persia (457-484). Balash was made King of Persia following the death of his brother Peroz who had died in a battle against the Hephthalites (White Huns) who invaded Persia from the east. Immediately after ascending the throne, he sought peace with the Hephthalites which cost the Persians a heavy tribute.