Abraham (Mar Oraham) of Kashkar was a legendary person of the Church of the East, from the family of Jacob, the brother of Jesus, who is conventionally believed to have sat from 159 to 171.
Brief accounts of the life of Abraham are given in the Ecclesiastical Chronicle of the Jacobite writer Bar Hebraeus (floruit 1280) and in the ecclesiastical histories of the Nestorian writers Mari (twelfth-century), ʿAmr (fourteenth-century) and Sliba (fourteenth-century).
He was consecrated at Antioch and sent into the East, where the Christians were being persecuted at that time by the Persians.
The king summoned Abraham to his presence, noticed that he looked sad and downcast, and asked him why.
In Fiey's view, Abraham was one of several fictitious bishops of Seleucia-Ctesiphon whose lives were concocted in the sixth century to bridge the gap between the late third century bishop Papa, the first historically attested bishop of Seleucia-Ctesiphon, and the apostle Mari, the legendary founder of Christianity in Persia.