Gabriel of Beth Qustan was a 7th-century Syriac Orthodox bishop and monk who served the community in Tur Abdin. Born in the village of Beth Qustan, he entered the Monastery of Qartmin as a monk before rising through the ecclesiastical ranks to become its abbot and the Archbishop of Dara. During his leadership, he likely negotiated the rights of his church following the Muslim conquest of Mesopotamia. He is remembered as a thaumaturge, a title reflecting the numerous miracles attributed to him during his lifetime and after his death.