Rav Yaakov Yechizkiyohu Grunwald of Pupa, the Vayaged Yaakov, was the son of Rav Moshe Grunwald, Rav and Rosh Yeshiva of Chust, and mechaber of several works, each entitled Arugas HaBosem. Rav Moshe’s brother, Rav Eliezer Dovid Grunwald, known as the Keren LeDovid, also headed an important Yeshiva. Although Rav Yaakov Yechizkiyohu’s father was not born into a Chassidic family, he had gravitated toward the Shiniva and Belzer Rebbes and had taken his son on his many visits to those Rebbes. Rav Yaakov Yechizkiyohu studied under his father until his marriage. In 1929, Rav Yaakov Yechizkiyohu was chosen as Rav of Pupa, Hungary. He established a Yeshiva there, which soon numbered three hundred students. Rav Yaakov Yechizkiyohu’s son, Rav Yosef Grunwald, succeeded his father.
