Rav Yehonasan Eybeshutz ztz"l (1690-1764, 21st of Elul)

Rav Eybeshutz was born in Cracow, Poland. At the age of 21 he became the Rosh Yeshiva of the Prague yeshiva. He authored many works in areas of halacha as well as kabbalah. Thirty of his works in the area of halacha have been published. His works include Urim V'tumim, Kereisi Ufleisi, Yaaros Dvash, and Ahavas Yehonasan (a commentary on the weekly haftorahs). Rav Eybeshutz is also famous for writing kameyos (amulets with holy writings) for women who were soon to give birth.