Vilna Gaon
Elijah ben Solomon Zalman, (Hebrew: ר' אליהו בן שלמה זלמן Rabbi Eliyahu ben Shlomo Zalman), also known as the Vilna Gaon (Yiddish: דער װילנער גאון Der Vilner Goen; Polish: Gaon z Wilna, Gaon Wileński; or Elijah of Vilna; Sialiec, Polish–Lithuanian Commonwealth, April 23, 1720 – Vilnius, Russian Empire, October 9, 1797), was a Lithuanian Jewish talmudist, halakhist, kabbalist, and the foremost leader of misnagdic (non-hasidic) Jewry of the past few centuries. He is commonly referred to or by his Hebrew acronym גר״א Gr״a Gaon Rabbenu Eliyahu "Our teacher Elijah the Genius", or in Modern Hebrew as ha-Gaon mi-Vilna "the genius from Vilnius".