History of the Jews and Judaism in the Land of Israel almost a decade after the arrival of two of his pupils, R. Hayim of Vilna and R. Israel ben Samuel of Shklov. In all there were three groups of the Gaon's students which emigrated to the land of Israel. They formed the basis of the Ashkenazi communities of Jerusalem and Safed, setting up what was known as the Kollel Perushim. Their arrival encouraged an Ashkenazi revival in Jerusalem, whose Jewish community until this time was mostly Sephardi. Many of the descendants of the disciples became leading figures in modern Israeli society. The Gaon himself also set forth with his pupils
Sephardi Hebrew the Ashkenazi pronunciation was derived from that of Palestine in Geonic times (7th-11th centuries) and that the Sephardi pronunciation was derived from that of Babylonia. The theory was supported by the fact that in some respects, Ashkenazi Hebrew resembles the western dialect of Syriac, and Sephardi Hebrew resembles the eastern dialect: Eastern Syriac "Peshitta" as against Western Syriac "Peshito". Ashkenazi Hebrew, in its written form, also resembles Palestinian Hebrew in its tendency to "malē" spellings (see Mater lectionis). Others, including Abraham Zevi Idelsohn, believed that the distinction is more ancient and represents the distinction between the Judaean and Galilean dialects