Their descendants and followers, and other scholars who joined the elite, are known as the tannaim. Hillel’s grandson, Gamaliel the Elder, was the first of six generations, Judah Ha-Nasi the last. The next generation, beginning with Rabbi Hiya Rabbah about 220 AD, inaugurated the age of the amoraim, which lasted five generations in Judaea, up to the end of the fourth century, and eight generations in Babylon, up to the end of the fifth.
