R. Jeremiah was a Tanna

Tannaim

The Tannaim were the Rabbinic sages whose views are recorded in the Mishnah, from approximately 70-200 CE. The period of the Tannaim, also referred to as the Mishnaic period, lasted about 130 years...

 sage of the last generation and an Amora sage of the first generation, active in the Land of Israel

Land of Israel

The Land of Israel is the Biblical name for the territory roughly corresponding to the area encompassed by the Southern Levant, also known as Canaan and Palestine, Promised Land and Holy Land. The belief that the area is a God-given homeland of the Jewish people is based on the narrative of the...

 during the transition period between the Tannaic and Amora sages eras. In Tractate Sukkah

Sukkah (Talmud)

Sukkah is a book of the Mishnah and Talmud. It is the sixth volume in the Order of Moed. Sukkah deals primarily with laws relating to the Jewish holiday of Sukkot...

 it is storied that that one of his pupils was a sage called Hezekiah, R. Rabbi Yehudah be-Rabbi Kalonymus mi-Speyer, the author of Sefer Yiḥusei Tanna'im ve-Amora'im, raises the question whether it was Hezekiah the son of R. Hiyya

Hiyya the Great

Rabbi Hiyya or Hiyya the Great was a Jewish sage of the Land of Israel during the transitional generation between the Tannaic and Amoraic Jewish sages eras . He is accounted as one of the notable sages of these times, and was the son of Abba Karsala from Kafri in Babylon....

or whether it was Hezekiah the son of the daughter of Rab.