Rab Acha Sela the Great, the grandfather of Rab Acha Sela. Abaye said, and perhaps this is the grandfather of Rabbi Chiya the Great. [According to some, it also seems erroneous; if he is the grandfather of Rabbi Chiya the Great, how could Abaye say, (as mentioned above, Abba bar Acha Sela)]:
Seder_HaDorot,_Tanaim_and_Amoraim.329:1