Jacobites
Here, the title “Jacobite” should not be confused with the English Jacobites, a political movement to resurrect the Stuart kingship in the 17-18th century. It refers to The Syriac Orthodox Church (the Syriac Orthodox Patriarchate of Antioch and All the East), which is informally known as the Jacobite Church.
It was founded by Jacob Baradaeus (aka Jacob bar Addai or Jacob bar Theophilus) or Saint Jacob, who was the Bishop of Edessa from 543 until his death in 578. Jacob’s missionary efforts helped establish the non-Chalcedonian Syriac Orthodox Church, and ensured its survival despite persecution.