Yitzchok Zev Halevi Soloveitchik (Hebrew: ???? ??? ???? ????????'??), also known as Velvel Soloveitchik ("Zev" means "wolf" in Hebrew, and "Velvel" is the diminutive of "wolf" in Yiddish) or the Brisker Rov ("rabbi of/from Brisk", (19 October 1886 – 11 October 1959), was an Orthodox rabbi and rosh yeshiva of the Brisk yeshiva in Jerusalem, Israel.
A scion of the Soloveitchik rabbinical dynasty, he is commonly referred to as the "GRY"Z" (an acronym for Gaon Rabbi Yitzchok Zev) and "The Rov".
He was known for his stringency in halakha (Jewish law) and advocacy for non-participation in the Israeli political system.