an Entity references as follows:
Elias III was the Patriarch of Jerusalem from about 879 to 907. According to the annals of Eutychius of Alexandria, he was a descendant of the family of Mansur ibn Sarjun, the grandfather of John of Damascus. According to Eutychius, he was appointed in the tenth regnal year of the Abbasid caliph al-Mu'tamid (r. 870–892), and remained in office until his death, a period of 22 years.