Hasidic Judaism was founded by Israel ben Eliezer (1700–1760), also known as the Baal Shem Tov, who had previously called themselves "Freylechn" ("happy ones") and now call themselves Hasidim ("pious, holy ones"). His charismatic disciples attracted many followers among Ashkenazi Jews, and established numerous Hasidic groups across Europe. The Baal Shem Tov came at a time when the Jewish masses of Eastern Europe were reeling in bewilderment and disappointment engendered by the two notorious Jewish false messiahs, Sabbatai Zevi (1626–1676) and Jacob Frank (1726–1791), and their respective followers. Hasidic Judaism eventually became the way of life for many Jews in Eastern Europe. The Hasidim are organized in independent "courts" or dynasties, each headed by its own hereditary spiritual leader-"rebbe". Unlike other Ashkenazim, most Hasidim use some variation of "Nusach Sefard", a blend of Ashkenazi and Sephardi liturgies, based on the innovations of Kabbalist Isaac Luria. Neo-Hasidism is trends of interest in the teachings of Kabbalah and Hasidism by members of other existing Jewish movements.