ר' אבא דמן קסרי

Rabbi Abba of Kessarin fasted [(Taanit 76b)], and it is stated that Rabbi Zeira of Kessarin, and at the end of Makkot it is taught before Rabbi Yochanan. [See there (Kiddushin 20b) Rabbi Ada of Kessarin (see there). And above, Rabbi Abba son of Rabbi Chiya son of Abba was in Kessarin, and perhaps Abba or Ada mentioned above is one and the same, and the error is in one of them, and Shitah Mekubetzes brought both as students of Rabbi Yochanan and it requires investigation, and above, Rabbi Abahu was in Kessarin]: