גידל בר מנשי

Gidal bar Menashe [and in the chapter according to bar Menashia] said Rav [Makkot (24b)] and in the chapter of one who has died [(Kiddushin 115b)] bar Menashe sent to Rava to teach us, our teacher. [And in the Rosh Ba"m he sent to Rav, but in the Asheri and the Rif several times to Rava] and perhaps he is another. [However, I saw in Makkot (24a) that Shmuel said. It seems that this was during the time of Rav and Shmuel.

And the author of She'arit Yosef did not include him among the students of Rav, and it requires further investigation.]