Ibas (Hiba) was bishop of Edessa 433–457 CE, except for the years 449–451 CE. He was a member of the School of Edessa, and was active in the translation of writings in Greek into Syriac, particularly the works of Theodore of Mopsuestia. During the Nestorian controversy (Nestorianism/Nestorius), Ibas was on the opposite side from Rabbula, bishop of Edessa (Rabbula of Edessa), a staunch supporter of Cyril of Alexandria’s miaphysite position. In a letter to Mari the Persian shortly after the Formula of Reunion was signed in…