Kotsk (Hasidic dynasty)

Kotsk (Kotzk) is the name of a Hasidic dynasty founded by Rebbe Menachem Mendel Morgenstern, known as the Kotzker Rebbe.

Kotsk is the Yiddish name of Kock, a town in present-day Poland.

The first Rebbe of Ger, Rabbi Yitzchak Meir Alter, known for his work as the Chidushei Harim, was a preeminent disciple of the Kotzker Rebbe. Following the Kotzker's death most of the Kotzker Hasidim formed the nucleus of the Ger dynasty.

The Kotzker Hasidim were known for their critical thinking and for a controversial way of expressing themselves.

Rebbe Menachem Mendl Morgensztern of Kotsk (originally of Tomashov) (1787–1859), the Alter Kotsker Rebbe

Rabbi Shalom Morgenstern, Scarsdale, New York (8th generation descendant of the Kotzker Rebbe)

Rabbi Mendle Meir Morgenstern, Kotzker Rebbe currently residing in Jerusalem. Published Amud Haemes and other Seforim of the dynasty

...
Wikipedia