He is one of seven children born in his father's second marriage to Chaya Nechama Ungar, daughter of the Nitra Rav, Rabbi Shmuel Dovid Ungar.
He is the eldest son of Rabbi Yekusiel Yehudah Halberstam, the first Sanz-Klausenberger Rebbe, who in his will divided the leadership of the Klausenburger Hasidim between his two sons, Rabbi Zvi Elimelech and Rabbi Shmuel Dovid (the present Sanz-Klausenburger Rebbe of Brooklyn).
David Halberstam | Shmuel Ashkenasi | Yekusiel Yehudah Halberstam | Solomon Joachim Halberstam | Shmuel Gonen | Shmuel Dovid Halberstam | Shmuel Yosef Agnon | Shmuel Shilo | Shmuel Safrai | Shmuel Dovid Ungar | Ben Zion Halberstam | Zvi Elimelech Halberstam | Yitzchok Dovid Groner | Yisroel Dovid Weiss | Shmuel Wosner | Shmuel Tamir | Shmuel Schnitzer | Shmuel Katz | Shmuel Hasfari | Shmuel HaNavi Street | Shmuel Gal | Shmuel Fershko | Shmuel Ben-Artzi | Nosson Dovid Rabinowich | Judith Halberstam | Isaac Halberstam | Giv'at Shmuel | Dovid Katz | David J. Halberstam | David Halberstam's |