He was Exilarch of the Jews in Babylon about 210-240. The line here begins to deviate from that in Stuart for several generations. Sources: 1. Stuart, R.W. "Royalty for Commoners" line 329. 2. ..., "Encyclopedia Judiaca", Vol.6, pp.1024-1025. 3. ..., "The Jewish Enclyclopedia" Vol.V, pp.288-290.