Jeanne-Nicole Mellon Saint-Laurent and David A. Michelson (eds.), "Isaac" in last modified August 17, 2016, http://syriaca.org/person/1278
    
        
            
                
                    Isaac
                    ISAAC
                    http://syriaca.org/person/1278
                    203
                    male
                    753-756
                    In hagiography: The patriarch Isaac became
          bishop of Ḥarran by the
          protection of the governor of the al-Jazira, ʿAbd
            Allāh. Issac became Patriarch when ʿAbd Allāh became Caliph
            Al-Mansur. But Al-Mansur had Patriarch Isaac killed and his body thrown into
            the Euphrates.
                    
                        Saints Syriaques
                        ISAAC
                        
                        203
                    
                    
                        
                            
                                Barsaum
                            
                        
                        Revue patriarcale
                        2
                        (1934), 38
                    
                    
                        
                            
                                J.M.
                                Fiey
                            
                        
                        BSO
                        
                        II,
               244