Rav Menachem Mendel Hager Ahavas Sholom

Rav Menachem Mendel Hager of Kossov was the founder of the Vizhnitz and Kossov dynasties and author of Ahavas Sholom. The son of Rav Yaakov Koppel Chassid, Rav Menachem Mendel was a student of Rav Moshe Leib of Sassov, Rav Tzvi Hirsch of Nadvorna, and Rav Zev Wolf of Tcharne-Ostra. His grandson was Rav Menachem Mendel of Vizhnitz.