רב אחא בר יוסף

Rab Acha bar Yosef came before Mar Ukva, and the next day he asked in the study hall. They said to him, "Rab Ada taught," and some say, "Mar bar Rab Ada." He said to him, "Rab Chiya bar Avin, I asked your teacher, Rab Ada bar Ahava, and Rab Huna," and he was very old and was leaning on the shoulder of Rab Nachman bar Yitzchak, his aunt's son. He said to him, "When we arrive at Rab Safra," and in our version, "Chisda," he enters [on Shabbat (Kiddushin 40a)], and he is a student of Rab Huna.

And it seems that this is not Rab Acha bar Yosef, for this was during the time of Mar Ukva and Shmuel, but rather the son of Rab Yosef, a student of Shmuel [it is a typographical error].