Sephardi Jews whose members have formally reverted to Judaism, leading to the emergence of Neo-Western Sephardim (see group below). The Jewish Agency for Israel estimates the Sephardic Bnei Anusim population to number in the millions. Their population size is several times larger than the three Jewish-integrated Sephardi descendant sub-groups combined, consisting of Eastern Sephardim, North African Sephardim, and the ex-converso Western Sephardim (both New World and Old World branches). Although numerically superior, Sephardic Bnei Anusim are, however, the least prominent or known sub-group of Sephardi descendants. Sephardic Bnei Anusim are also more than twice the size of the total world Jewish population
Ashkenazi Hebrew from Spain in 1492 (or before) the Sephardic pronunciation of the vowels became standard in all these countries, ironing out any differences that previously existed. This makes it harder to adjudicate between the different theories on the relationship between today's pronunciation systems and those of ancient times. Leopold Zunz believed that the Ashkenazi pronunciation was derived from that of Palestine in Geonic times (7th–11th centuries CE), while the Sephardi pronunciation was derived from that of Babylonia. This theory was supported by the fact that, in some respects, Ashkenazi Hebrew resembles the western dialect of Syriac while Sephardi Hebrew resembles the