Rabbi Simcha Hagadol HaKohen Rappaport (Hebrew: שמחה הכהן ראפאפארט; b. 1650 - August 4, 1718) was a 17th-century Ukrainian rabbi and progenitor of the Rappaport rabbinic dynasties. Born in about 1650 in L'viv, Ukraine. His father, Nachman of Belz was a minor rabbi and a descendant of Rashi through his mother.[1] In his early years Rappaport studied in L'viv. In 1688 he was appointed the Chief Rabbi of Horodna. He was later appointed to be Av Bris Din of Levov, although he died on the way there on August 4, 1718 in Szczebrzeszyn.[2] The Soloveitchik dynasty says Rappaport is a notable ancestor and progenitor.[3]