Hence he was already by Gennadius of Marseilles (before 496) confused with Jacob, bishop of Nisibis; and the ancient Armenian version of nineteen of the homilies has been published under this latter name.
But (1) Jacob of Nisibis, who attended the council of Nicaea, died in 338; and (2) our author, being a Persian subject, cannot have lived at Nisibis, which became Persian only by Jovian's treaty of 363.
He became a ward and disciple of the famous Jacob - the same who attended the Council of Nicaea as bishop of Nisibis, and died in 338.
At his hands Ephraim seems to have received baptism at the age of 18 or of 28 (the two recensions differ on this point), and remained at Nisibis till its surrender to the Persians by Jovian in 363.
In 337, in the course of which Nisibis was thrice unsuccessfully besieged by the Persians (in 33 8, 34 6 and 350).