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.[1] He was named after his mother's father, who was murdered in the Holocaust. His older brother, Rabbi Zvi Elimelech Halberstam, is the Sanzer Rebbe of Israel, and he also has five sisters. He married Tzipora Weider, daughter of Rabbi Aharon Wieder, the Linzer Rav, who was a long-time dayan in the Klausenberger beis din (rabbinical court) in America.[2]