Levi Yitzchok of Berditchev (Levi Yitzchok Derbarmdiger (compassionate in Yiddish) or Rosakov) (1740–1809), also known as the holy Berdichever, and the Kedushas Levi, was a Hasidic master and Jewish leader. He was the rabbi of Ryczywół, Żelechów, Pinsk and Berdychiv, for which he is best known. He was one of the main disciples of the Maggid of Mezritch, and of his disciple Rabbi Shmelke of Nikolsburg, whom he succeeded as rabbi of Ryczywół. Today, there are several synagogues called Berditshev, of which the rabbis of some are called Berditshever Rebbes.