Grand Rabbi Pinchas David Horowitz, the first Bostoner Rebbe, a scion of Shmelke of Nikolsburg and the Lelov dynasty, was born in Jerusalem in Ottoman Syria. He first arrived in Boston in 1915 from the Russian Empire, where he had gone to collect charity. Shortly after his arrival, Rabbi Pinchas David was accepted as Rebbe by a group of followers he attracted from within the Boston Jewish community. However, in 1939, he left Boston and moved to Brooklyn where he opened the Bostoner beth midrash of Williamsburg, Brooklyn. After his death in 1941, his older son, Rav Moshe, succeeded him in New York, while his younger son, Levi Yitzchak Horowitz, moved back to Boston in 1943 and built the New England Chassidic Center. In his lifetime, Reb Moshe founded the Bostoner beth midrash of Crown Heights, Brooklyn and the Bostoner beth midrash of Borough Park, Brooklyn. In 1985, upon the passing of Reb Moshe, his eldest son, Chaim Avrom Horowitz, succeeded him as Bostoner Rebbe of New York. In 1989, Reb Moshe's younger son, Pinchas Dovid, moved to Flatbush, Brooklyn to establish a community there. He eventually accepted the mantle of Bostoner Rebbe of Flatbush. In 2006, Rav Chaim Avrom moved to Beit Shemesh in Israel to establish a community there. He died in 2016 while visiting America for his granddaughter's wedding to the grandson of the Skverer and Rachmanstrifker Rebbes. He was succeeded by his sons, Rabbi Yaakov Yitzchak Horowitz of Lawrence, NY, And Rav Yisrael Yona Horowitz of Boro Park. In the mid 1980s, Levi Yitzchak Horowitz established another Boston community in Har Nof, Jerusalem, and would spend half of the year in Boston and half of the year in Jerusalem. On Saturday, December 5, 2009 Levi Yitzchok Horowitz died in Jerusalem, survived by his three sons and two daughters. In his spiritual will, the title of Grand Rabbi of Boston was bestowed upon all three surviving sons. Pinchas Dovid Horowitz, the Chuster Rebbe of Borough Park, the oldest, serves as Bostoner Rebbe in New York; Mayer Alter Horowitz serves as Bostoner Rebbe in Har Nof; and Naftali Yehuda Horowitz, the youngest, serves as Bostoner Rebbe in Boston.
***Rabbi Yaakov Yitzchak Horowitz of Lawrence, NY – son of Grand Rabbi Chaim Avrohom
***Rabbi Yisroel Yona Horowitz Bostoner Rebbe of Boro Park – son of Grand Rabbi Chaim Avrohom
**Grand Rabbi Pinchas Duvid Horowitz, present Bostoner Rebbe of Flatbush – son of Grand Rabbi Moshe Horowitz
***Rabbi Mordechai Horowitz R"M of Darchei Noam - son of Grand Rabbi Pinchos Dovid of Flatbush
***Rabbi Chaim Avrohom Horowitz of Monsey – son of Grand Rabbi Pinchos Duvid of Flatbush
*Grand Rabbi Levi Yitzchak Horowitz, the Bostoner Rebbe in Brookline and Har Nof – son of Rabbi Pinchas David Horowitz
**Rabbi Pinchas Duvid Horowitz – Chuster Ruv - eldest son of Grand Rabbi Levi Yitzchok - successor to his father as Bostoner-Chuster Rebbe of New York, and Chuster-Bostoner Rebbe of Betar Illit
***Rabbi Moshe Shimon Horowitz, Bostoner Ruv of Betar Illit - eldest son of the Chuster-Bostoner Rebbe
***Rabbi Yisroel Aharon Horowitz - son of the Chuster-Bostoner Rebbe and son-in-law of Rabbi Yitzchok Arie Weiss, Horodonka Rebbe of Manchester, England
***Reb Shia'le Horowitz, Bostoner Ruv of Monsey, New York - son of the Chuster-Bostoner Rebbe
***Rabbi Yechiel Mechel Horowitz, Bostoner Ruv of Highland Park, New Jersey - son of the Chuster-Bostoner Rebbe
**Rabbi Mayer Alter Horowitz of Jerusalem - middle son of Grand Rabbi Levi Yitzchok, successor to his father as Bostoner Rebbe in the Har Nof section of Jerusalem.
**Rabbi Naftali Yehuda Horowitz, Bostoner Rebbe – youngest son of Grand Rabbi Levi Yitzchok, successor to his father as the Bostoner Rebbe of Boston.