R' Yaakov Aryeh ben R' Shlomo Guterman of Radzimin (1878) was a descendant of the Shach. He was a talmid of the Magid of Koznitz, R' Simcha Bunim of Pishischa and his son, R' Avrohom Moshe and R' Yitzchok of Vorki. He had thousands of chassidim, among them some of the greatest tzadikim of Poland, flock to him after the passing of R' Yitzchok of Vorki. Was also known as a great Baal Mofes. Author of Bikurei Aviv and Divrei Aviv.