According to G. Graf (1947, pp. 435-36) author of the chronology for the oldest history of the Orientale, suggesting that he lived at the latest before the end of the thirteenth century. He was born a Jew and became a Christian (al-Masihi). There exists an exchange of between him and the Jew Abu al-‘Ala’ al-Sa’ij, the brother of Dawud al-Balat, dating from the time at Abu al-Fakhr’s conversion, in which difficult passages in the Gospels are explained and objections to Christian doctrine discussed.

There also is a summary work, the Book of Chronicles (Kitab al-Tawarikh) in the Museum ( Supplement 34; 1789, following a 1594/5 copy) by an unknown author who used the Orientale, including the part due to Abu al-Fakhr, and the historical work of Sa‘id IBN AL-BITRIQ, Agapius, Epiphanius, and others. In it there are time and dynasty tables up to the year 1257, and the popular time reckoning is brought into agreement with the Coptic (martyr) CALENDAR.