Yitzchak Eizik Chaver

Rabbi Yitzchak Eizik Chaver (Wildmann) was a rabbi, halakhist, and kabbalist active across the Lithuanian and Polish lands in the first half of the nineteenth century. Born in Grodno in 1789, he studied under Rabbi Menachem Mendel of Shklov, a disciple of the Vilna Gaon, and went on to transmit the Gaon's approach to Kabbalah. Over a long rabbinic career he held communal posts in Porozovo, Ruzhany, Volkovysk, and Tykocin before settling in Suwalki, where he died around 1852. A prolific author in both law and mysticism, he is best remembered for Pischei Shearim, a structured commentary that expounds the kabbalistic system of Isaac Luria as recorded in Chaim Vital's Etz Chaim. His further writings include the responsa collection Shu"t Binyan Olam, the halakhic Beis Yitzchak, and the homiletical Siach Yitzchak.