Mizrahi Jews the Arab world, such as Syria and Morocco. In Syria, most eventually intermarried with, and assimilated into, the larger established communities of Musta'rabim and Mizrahim. In some North African countries, such as Morocco, Sephardi Jews came in greater numbers, and largely contributed to the Jewish settlements that the pre-existing Jews were assimilated by them. Either way, this assimilation, combined with the use of the Sephardi rite, led to the popular designation and conflation of most non-Ashkenazi Jewish communities from the Middle East and North Africa as "Sephardi rite", whether or not they were descended from Spanish Jews, which is what
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