Judah ben Bathyra
Judah ben Bathyra or simply Judah Bathyra (also Beseira, Hebrew: יהודה בן בתירא) was an eminent tanna. He must have lived before the destruction of the Temple, since he prevented a pagan in Jerusalem from partaking of the Paschal offering. Thereupon he received the message: "Hail to thee, Rabbi Judah ben Bathyra! Thou livest in Nisibis, but thy net is spread in Jerusalem" (Pes. 3b). Since R. Judah was not present himself at the Passover in Jerusalem, it may be concluded that he was far advanced in years, although as a citizen of a foreign land he was not bound by the law which demanded the celebration of the Passover at Jerusalem (Tosefot to Pes. l.c.). At Nisibis in Mesopotamia he had a famous college, which is expressly recommended together with other famous schools (Sanh. 32b).
Personal interactions
R. Eleazer ben Shammua and R. Johanan the sandal-maker started on a journey to Nisibis in order to study under Judah ben Bathyra, but turned back when they reflected that they were giving preference to an alien country over Israel (Sifre, Deut. 80).