Complex sentence: With his untimely death, his son Rabbi Malkiel Kotler took over the leadership of the yeshiva, assisted by three other grandchildren of Rabbi Aharon Kotler, Rabbis Dovid Schustal, Yerucham Olshin and Yisroel Neuman.
Split into simpler sentences: With his untimely death, his son Rabbi Malkiel Kotler took over the leadership of the yeshiva, assisted by three other grandchildren of Rabbi Aharon Kotler. These were Rabbis Dovid Schustal, Yerucham Olshin and Yisroel Neuman.