Boruch of Medzhybizh (1753–1811), the first major "rebbe" of the Hasidic movement to hold court in Mezhbizh and Beis Medrash
In Medzhybizh, Ukraine, burial place of the Baal Shem Tov, Gabbai was instrumental in refurbishing the Baal Shem Tov's grave and ohel, which also covers the graves of the Degel Machaneh Ephraim, the Apter Rav, and Rabbi Boruch of Medzhybizh.