Complex sentence: Izhbitza-Radzin is the name of a Hasidic dynasty founded by Rabbi Mordechai Yosef Leiner, author of "Mei Hashiloach", in the city of Izhbitza.
Split into simpler sentences: Izhbitza-Radzin is the name of a dynasty of Hasidic rebbes. The first rebbe of this dynasty was Rabbi Mordechai Yosef Leiner, author of "Mei Hashiloach", in the city of Izhbitza.