Rachmastrivka is a Hasidic dynasty named after the town of Rotmistrivka, Ukraine.

It is an offshoot of the Chernobyl dynasty dating back to the 19th century.

[1][2] There are currently eight rebbes, whose courts are located in Jerusalem, in Borough Park, Brooklyn, in Lakewood Township, New Jersey, in Linden, New Jersey, in Monsey, NY, in Williamsburg, Brooklyn, and in Spring Valley, NY.

This has continued into the next generation; the new rebbe in Jerusalem visited New York on September 14, 2006, and stayed with his uncle.

Rebbe Mordechai's father, Rebbe Menachem Nachum Twersky of Chernobyl (author of Meor Einayim), was a disciple of the Baal Shem Tov, the founder of Hasidism.