Mor Barsawmo, known in Western sources as Barsumas, died around the year 457. He was an archimandrite. and was active during the Christological controversies of the fifth century. He was invited by Emperor Theodosius II (d. 450) to the Second Council of Ephesus in 449, and was among those who presented petitions in favor of Dioscorus of Alexandria at the Council of Chalcedon.

His life was written in Syriac around the 6th or 7th centuries and is the source of all other oriental versions.