Shemariah ben Mordecai
Shemariah ben Mordecai was a German rabbi and tosafist of the first half of the 12th century, who was a pupil of the tosafist Isaac ben Asher. He was considered an especially eminent authority on religious rites, and seems to have written posḳim ; no less a person than Jacob b. Meïr Tam consulted him on a difficult question.
Those of Shemariah's pupils most deserving mention are Judah b. Kalonymus b. Meïr, author of Yiḥuse Tannaim va-Amoraim, and Judah ben Kalonymus, father of Eleazar of Worms. The former usually calls him mori ha-yashish, which seems to indicate that Shemariah died at an advanced age. It is, however, not true that Eleazar of Worms also was his pupil, as has been asserted by some.- Epstein, Das Talmudische Lexicon, in Monatsschrift, xxxix. 453-454 ;
- Kohn, Mardochai b. Hillel, p. 15
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