Kotzk

Kotzk (Yiddish: קאצק) is a Hasidic dynasty originating from the city of Kock, Poland, where it was founded by Menachem Mendel Morgenstern (1787–1859).

Following Simcha Bunim's death he led the divided Peschischa community, which he eventually incorporated into his own Hasidic dynasty.

[1] From roughly 1838–1859, Menachem Mendel Morgenstern lived in seclusion from his followers except for his family (which included at least 3 future Rebbes, his son, Dovid, grandson Chaim Yisrael, and son in law Avraham Bornstein), the future Gerer Rebbe who would become known as the Chidushei HaRim, the Gastainer Rebber and the Vorker Rebbbe.

It was around this time that Avrohom Bornsztain (1838–1910), a leading disciple of Menachem Mendel Morgenstern founded the Sochatchov Hasidic dynasty based in Sochaczew.

Following the atrocities of the Holocaust, some of the remaining Hasidim of Kotzk immigrated to Chicago alongside the sixth and last Kotzker rebbe, David Solomon Morgenstern (1904–1962).