Enc. Britannica, 1977 (Jacob, also called James (c. AD 640-708), Syriac scholar and Bishop of Edessa)
His A letter from Jacob of Edessa to John the Stylite of Litarab concerning ... 1979 (a.e.) t.p. (Jacob of Edessa) p. 117 (633-708) p. 17 ("no exact information as to the time of his birth") p. 48, etc. (Yaʻḳov [in Estrangelā Syriac])
LC manual cat. (hdg.: Jacob, of Edessa, 640 (ca.)-708; variants: Jacob, Mar, bp. of Edessa; Jacobus Edessenus; James, of Edessa; Yâḳûb, Mar, bp. of Edessa; Jakob von Edessa; Jaʻqōb von Edessa; Iacobi Edesseni; Jacques d'Édesse)
Smith, W. Dict. of Chr. biog., 1977 (Jacobus Edessenus; ordained bishop 651)