Is̆oʻdad, of Merv, Bishop of Ḥĕdhatha, active 9th century
Yeshudad, of Merv, Bishop of Ḥĕdhatha, active 9th century
Īshōʻdād, of Merv, Bishop of Ḥĕdhatha, fl. 9th cent
Notes:
New Catholic encyc., 1967 v. 7, p. 672 (Īshōʻdād, of Merv, Nestorian bishop and exegete; bishop of Ḥĕdhatha; was active around the middle of the 9th century)
nuc88-83187: His Commentaire d'Is̆oʻdad de Merv sur l'Ancien Testament, 1972 (hdg. on OCH rept.: Īshōʻ-dadh, of Merv, Bishop; usage: Is̆oʻdad de Merv)
nuc89-17814: Molenberg, C. The commentary on the books ... 1987 (hdg. on NhD rept.: Is̆oʻdad, of Merv; usage: Is̆oʻdad of Merv)
Wikipedia, viewed Feb. 17, 2015 (Ishodad of Merv; Yeshudad of Merv; active 850 AD; died shortly after 852 AD; Bishop of Hdatta; prominent theologian of the Church of the East)