About Elazar Ben Azariah, אלעזר בן עזריה
Eleazar ben Azariah אלעזר בן עזריה, was a 1st-century CE Palestinian tanna (Mishnaic sage). He was of the second generation and a junior contemporary of Gamaliel II, Eliezer b. Hyrcanus, and Joshua b. Hananiah, and senior of Akiva. He was a Kohen and traced his pedigree for ten generations back to Ezra, and was very wealthy. These circumstances, added to his erudition, gained for him great popularity. When Gamaliel II, in consequence of his provoking demeanor, was temporarily deposed from the patriarchate, Eleazar, though still very young, was elevated to that office by the deliberate choice of his colleagues. He did not, however, occupy it for any length of time, for the Sanhedrin reinstated Gamaliel. He was retained as vice-president ("ab bet din"), nevertheless, and it was arranged that Gamaliel should lecture three (some say two) Sabbaths, and Eleazar every fourth (or third) Sabbath.