Ishoʿyahb Ishaʿya Yohannan Gabriel (or Jean Guriel, 1758–1833) was bishop of Salmas of the Chaldean Catholic Church from 1795 to his death.
His appointment was resisted by a party in the Salmas district, who wanted as their bishop the priest Isaac, a nephew of the late metropolitan Ishoʿyahb Shemʿon.
They sent Isaac to the Nestorian patriarch Shemʿon XVI Yohannan, who consecrated him bishop of Salmas at Qudshanis, giving him the name Ishoʿyahb Melchisedec.
As metropolitan of Salmas he was recognised as vicar with jurisdiction over the Mar Thoma Christians of Malabar by the Vatican in 1801.
[4]: 291 On 8 September 1804, on instructions from the Vatican, he consecrated Augustine Hindi metropolitan of Amid and patriarchal administrator in Mardin.