Rabbi Yisrael had five sons: Rabbi Aharon of Sadigura (the author of "Kedushas Aharon") (1877–1913) who had considerable musical accomplishment, Rabbi Shlomo Yosef of Chernovitz, Rabbi Avrohom Yaakov Friedman of Sadigura (1884–1961), Rabbi Yitzhak of Rimanov (1887–1929), and Rabbi Shlomo Chaim (Reb Shlomenu) of Sadigura (1887–1972). After Rabbi Yisrael's death in 1907, each of his sons became Rebbes, making their courts and conducting their "tishen" in different halls of the great Sadigura synagogue. Rabbi Yisrael's eldest son, the "Kedushas Aharon", died in 1912 and was succeeded by his 16-year-old son, Rabbi Mordechai Sholom Yosef Friedman.