His eldest brother, Pinchos Dovid Horowitz, is the Bostoner-Chuster rabbi of Borough Park, Brooklyn, and his other brother Mayer Alter Horowitz is the Bostoner rebbe of Har Nof, Jerusalem.
Horowitz's elder brother, Pinchos Dovid Horowitz, serves as the rabbi in Borough Park, Brooklyn, while his younger brother, Mayer Alter Horowitz, holds the position of rebbe in Har Nof, Jerusalem.