Kotsk is the name of a Hasidic

Hasidic Judaism

Hasidic Judaism or Hasidism, from the Hebrew —Ḥasidut in Sephardi, Chasidus in Ashkenazi, meaning "piety" , is a branch of Orthodox Judaism that promotes spirituality and joy through the popularisation and internalisation of Jewish mysticism as the fundamental aspects of the Jewish faith...

 dynasty founded by Rebbe Menachem Mendel Morgenstern

Menachem Mendel of Kotzk

Menachem Mendel Morgensztern of Kotzk, better known as the Kotzker Rebbe was a Hasidic rabbi and leader.-Life:Born to a non-Hasidic family in Goraj near Lublin, Poland, he became attracted to Hasidim in his youth. He was known for having acquired impressive Talmudic and Kabbalistic knowledge at a...

, known as the Kotzker Rebbe.

Kotsk is the Yiddish

Yiddish language

Yiddish is a High German language of Ashkenazi Jewish origin, spoken throughout the world. It developed as a fusion of German dialects with Hebrew, Aramaic, Slavic languages and traces of Romance languages...

 name of Kock

Kock

Kock is a town in eastern Poland, about 45 km north of Lublin and 120 km south-east of Warsaw. It lies in Lublin Voivodeship, in Lubartów County. It is the capital of the Kock Commune.As of 2004, its population numbered 3,509.-History:...

, a town in present-day Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

.

The first Rebbe of Ger

Ger (Hasidic dynasty)

Ger, or Gur is a Hasidic dynasty originating from Ger, the Yiddish name of Góra Kalwaria, a small town in Poland....

, Rabbi Yitzchak Meir Alter

Yitzchak Meir Alter

Yitzchak Meir Alter , is considered to be the first Rebbe of the Ger Hasidic dynasty, which he founded in the town of Góra Kalwaria , Poland. He was also known as the Chidushei HaRim for his Torah books...

, 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

Ger (Hasidic dynasty)

Ger, or Gur is a Hasidic dynasty originating from Ger, the Yiddish name of Góra Kalwaria, a small town in Poland....

.

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

Lineage

Rebbe Menachem Mendl Morgensztern

Menachem Mendel of Kotzk

Menachem Mendel Morgensztern of Kotzk, better known as the Kotzker Rebbe was a Hasidic rabbi and leader.-Life:Born to a non-Hasidic family in Goraj near Lublin, Poland, he became attracted to Hasidim in his youth. He was known for having acquired impressive Talmudic and Kabbalistic knowledge at a...

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

• Rebbe Dovid Morgensztern of Kotsk (1809–1873), son of Rebbe Menachem Mendl
  • Rebbe Yaakov Yehoshua Morgensztern of Kotsk (1836–1907), son of Rebbe Dovid
    • Rebbe Chayim Yisroel Morgensztern of Pilov (1840–1905), author of Shloim Yerusholayim, son of Rebbe Dovid
      • Rebbe Tsvi Hersh Morgensztern of Łuków (1858–1920), author of Ateres Tsvi, son of Rebbe Chayim Yisroel
      • Rebbe Moshe Mordechai Morgensztern of Pilov (1862–1929), author of Medrash Moshe, son of Rebbe Chayim Yisroel
      • Rebbe Yitschok Zelig Morgensztern of Sokolow(1866–1939), son of Rebbe Chayim Yisroel
        • Rebbe Yaakov Menachem Mendl Morgensztern of Wengrow (1887–1939), son of Rebbe Yitschok Zelig
      • Rabbi Shlomo Morgenstern, London & Chicago, the last Kotsker Rebbe Son of Rebbe Yaakov Menachem Mendel of Wengrow
      • Rabbi Avraham Morgenstern, Chicago & Miami, Son of Rebbe Yaakov Menachem Mendle of Wengrow
    • Rebbe Tsvi Hersh Morgensztern of Lomaz, Łomazy District (1852–1926), son of Rebbe Dovid
      • Rebbe Yaakov Arye Morgensztern of Wyszków
        Wyszków
        Wyszków is a town in northeastern Poland with 26,500 inhabitants . It is the capital of Wyszków County . Wyszków is situated in the Masovian Voivodeship ; previously it was in Warsaw Voivodeship and Ostrołęka Voivodeship .-Description:The village of Wyszków was first documented in 1203. The town...
        
        (born 1878), son of Rebbe Tsvi Hersh of Lomaz

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