Isaac (Hebrew: יצחק) was head of the Palestinian Gaonate in the 10th century.
According to a fragment found in the Cairo Genizah (T-S 312.82), Isaac reigned as Gaon for two years.
Gil estimates his reign to have occurred around 910-912 CE.
[1] According to the approach of Abramson and Stern, Isaac was Av Beit Din during the calendar controversy of 921.
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