Joseph B. Soloveitchik, Belorussian-American rabbi and philosopher (d. 1993)
Joseph Ber Soloveitchik (Hebrew: יוסף דב הלוי סולובייצ׳יק Yosef Dov ha-Levi Soloveychik; February 27, 1903 – April 8, 1993) was a major American Orthodox rabbi, Talmudist, and modern Jewish philosopher. He was a scion of the Lithuanian Jewish Soloveitchik rabbinic dynasty.

As a rosh yeshiva of Rabbi Isaac Elchanan Theological Seminary at Yeshiva University in New York City, The Rav (variantly spelled The Rov), as he came to be known (alternatively referred to as "Rov Yosheh Ber" by other rabbinic figures), ordained close to 2,000 rabbis over the course of almost half a century.

He served as an advisor, guide, mentor, and role-model for tens of thousands of Jews, both as a Talmudic scholar and as a religious leader. He is regarded as a seminal figure by Modern Orthodox Judaism.