Rav Yaakov Yukel Ettlinger Oruch LaNer

Rav Yaakov Ettlinger was the son of Rav Aharon, Rosh Yeshiva of the local mesivta in Karlsruhe, Germany, and grandson of the Shaagas Aryeh. In 1823, he was appointed Rosh Yeshiva of the Bais Medrash in Mannheim, and twelve years later became Rav and Rosh Yeshiva of Altona. He authored many seforim, including Aruch LeNer, Binyan Tzion and Bikurei Yaakov. He gave semicha to Rav Shimshon Refoel Hirsch after the latter learned with him for barely a year.