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.
They made their way to Bistritz, which was under partisan control, but when the Germans attacked that city the following month, they fled and spent the winter hiding in mountain caves and subsisting on starvation rations.
Halberstam was a child of his father's second marriage in 1947 to Chaya Nechama Ungar, the orphaned daughter of the Nitra Rav, Rabbi Shmuel Dovid Ungar.
Shmuel Ashkenasi | Jay Ungar | Shmuel Gonen | Shmuel Dovid Halberstam | Stu Ungar | Shmuel Yosef Agnon | Shmuel Shilo | Shmuel Safrai | Shmuel Dovid Ungar | Ruth Ungar | 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 | Hermann Ungar | Giv'at Shmuel | Dovid Katz | André Ungar |