About Natan bar Achaya, Nasi & rival to Simon bar Gamaliel
Nathan ben Ahija (Achaya) is the son of Ahija ((Achaya) David.
Nathan, went to Palestine, and by virtue of his ancestry gained a following among Palestinian Jews to displace the Hillelite "Nasi" Simon [Bar Gamaliel], but the conspiracy against the Palestinian Patriarch collapsed due to the failure of the Palestinian Jews to rise up in his support.
He was subsequently among the confidants of the patriarchal house, and in intimate relations with the Palestinian "Nasi" (135-165). His grandson, Rav[a], returned to the exilarchal house in Babylonia, AD 219, and died in AD 247.