Heschel was a descendant of preeminent rabbinic families of Europe, both on his father's (Moshe Mordechai Heschel, who died of influenza in 1916) and mother's (Reizel Perlow Heschel) side, and a descendant of Rebbe Avrohom Yehoshua Heshl of Apt and other dynasties. He was the youngest of six children including his siblings: Sarah, Dvora Miriam, Esther Sima, Gittel, and Jacob. In his teens he received a traditional yeshiva education, and obtained traditional semicha, rabbinical ordination. He then studied at the University of Berlin, where he obtained his doctorate, and at the Hochschule für die Wissenschaft des Judentums, where he earned a second liberal rabbinic ordination.