Semah ben Josiah

Semah ben Josiah (Hebrew: צמח בן יאשיהו) was the great-grandson of Anan ben David, a Nasi, and the head of the Palestinian yeshiva in the 9th century.

Details
According to a fragment found in the Cairo Genizah (T-S 312.82), Semah reigned as head of the Palestinian Yeshiva for 31 years and was a Rabbanite. His children lost the position to the rival Gaonic family. Another Genizah fragment (T-S 12.128) lists Semah as both a Rosh Yeshiva and a Nasi.

Semah was proceeded in the Gaonate by his brother Jehoshaphat.