Rav Naftali Trop, Rosh Yeshiva Radin (1871-1930). Born in Grodno, he studied with his father, Rav Moshe Trop, who was Rosh Yeshiva of a local yeshiva. At 14, he left for Kelm, then Solodka, then Telz, where he became close to Rav Eliezer Gordon. In 1889, he returned to Slobodka, when Rav Yaakov Yitzchak (Itzel) Rabinowitz was appointed Rosh Yeshiva. There, he became his close talmid. In 1890, Rav Hirshel Levitan appointed him Rosh Yeshiva of Or HaChaim in Slobodka. In 1903, he replaced Rav Moshe Landinski as Rosh Yeshiva in Radin, where he remained for the rest of his life.
Rav Yisrael Lipshitz of Danzig, author of Tiferes Yisrael, a popular commentary on the Mishnayos (1782-1860). He also authored Shevilei D’rakiya, an introduction to the principles of Rabbinical astronomy and determining the Molad; it appears in the beginning of Seder Mo’ed in the “Tiferes Yisrael” sets of Mishnayos. Additionally, he wroted Derush Ohr HaChaim” (Homily on the Light of Life) which debates the eternality of the soul.
Rav Shimon Nosson Nota Biderman, the Lelover Rebbe (1929)
Rav Chizkiyahu Yosef Mishkofsky of Krinki (1946)
Rav Aharon Yechiel (Reb Ahrele) Hopstein of Kuzhnitz (1889-1942). Reb Ahrele was a direct descendent of the Maggid Kozhnitz, who – along with the Chozeh of Lublin, Rav Mendel of Riminov, and the Oheiv Israel of Opt – were the greatest talmidim of Rav Elimelech of Lizhensk and who were primarily responsible for the spready of Chassidus throughout Europe. Rav Aharon Yechiel’s father, Rav Yerachmiel Moshe, was the sixth Kuzhnitzer Rebbe, was niftar in 1909. Another son of Rav Yerachmiel Moshe, Rav Yisrael Elazar, moved to Eretz Yisrael in 1923 and helped found Kfar Chassidim and Kfar Ata.
Rav Yitzchak Zekel Leib Wormeiser, also known as the Baal Shem of Michaelstadt (1768-1847). At the age of 17, he left home to learn at the yeshivah gedolah of Frankfurt, headed by Rav Pinchas Horowitz, the Baal HaFla’ah. He also became close to Rav Nosson Adler, the Chasam Sofer’s rebbi. After his marriage at the age of 22, he moved to Michelstat, where he founded a yeshiva.
Rav Dovid Rapaport (1890-1941). Born in Minsk, his mother was a descendant of the Gaon of Vilna while his father, Rav Akiva, was the grandson of Rav Akiva Eiger. When he was still a young man, he enrolled in Ponovezh, having already written his sefer, Tzemach Dovid, on the chiddushim and halachic responsa of his grandfather. From Ponovezh, Rav Dovid went on to study in Kollel Beis Yisrael of Slabodka. After his marriage, he and his wife were supported by his father-in-law, during which period Rav Dovid was able to compile his second major work, Mikdash Dovid, which focuses on the tractates of Kodshim, Taharos, Bechoros and Sanhedrin. Then, during World War One, Rav Dovid had to flee and found refuge in Vilna. Later on, Rav Elchanan Wasserman invited Rav Dovid to deliver shiurim in Yeshivas Ohel Torah in Baranovich.This yeshivah was founded in 1907 at the initiative of Rav Yosef Yozel Horowitz, the Alter of Novhardok. During the outbreak of World War Two, Rav Dovid remained in Ohel Torah, joining the yeshivah on its treks to Vilna and, from there, to Turkey and Smilishuk. On the 19th of Sivan, 1941, an NKVD agent burst into the yeshivah and arrested him. After his trial, Rav Dovid was sent to a forced labor camp in a distant village, near Finland.