Abbahu (Hebrew: אבהו) was a Jewish Talmudist, known as an amora, who lived in the Land of Israel, of the 3rd amoraic generation (about 279-320), sometimes cited as R. Abbahu of Caesarea (Ḳisrin). His rabbinic education was acquired mainly at Tiberias, in the academy presided over by R. Johanan, with whom his relations were almost those of a son (Yer. Berakhot ii.4b; Gittin 44b; Bava Batra 39a). He frequently made pilgrimages to Tiberias, even after he had become well known as rector of the Caesarean Academy (Yer. Shab viii.11a; Yer. Pesahim x.37c).
Read more about Abbahu: Knowledge of Greek Literature, Rector in Caesarea, Abbahu and Ḥiyya B. Abba, Other Abbahus, Against The Christians, Jewish Encyclopedia Bibliography