Mordechai Leifer (or LäuferThis was how the surname was previously known, also spelled that way in historical vital records for his family.) (1824–1894) was a rabbi in Nadvirna, Ukraine.
Biography Leifer was the son of Rabbi (d. 1848), author of Sisrei Torah, and a great-great-grandson of Rabbi of Premishlan. He served as a Hasidic Rebbe of Nadvirna (Nadwórna). He was raised by his great uncle, Rebbe of Premishlan. Hasidim from all over Hungary and Romania would come to receive his blessings. An extraordinarily large number of his descendants became Hasidic rebbes, including many around the world today. His teachings are collected in Gedulas Mordechai, Tiferes Mordechai, Aspaklarya Hameira, Maamar Mordechai and Oros Mordechai.
Leifer is buried in Bushtyno, Ukraine.
His wife, Chaya (d. 1891), was the daughter of Rabbi , Chief Rabbi of Yas, son of Rabbi Aaron Moses Taubes, author of the To'afos R-eim.
They were survived by six sons and one daughter: Rebbe Yitzchock Leifer of Stanislav Rebbe of Satmar Rebbe Meir Rosenbaum of Kretchnif Rebbe of Żołynia-Łańcut Rebbe of Chust Rebbe Yoseph Leifer of Niredhaz Rebbitzen Leah Bina Igra of Zolynia (died childless)
Today, there are close to 100 Grand Rebbes who claim descent from Rebbe Mordechai of Nadvorna.
References
See also Nadvorna (Hasidic dynasty)