Mordechai Leifer (or Läufer[1]) (1824–1894) was a rabbi in Nadvirna, Ukraine.
Leifer was the son of Rabbi Yesochor Bertche Leifer (d. 1848), author of Sisrei Torah,[2] and a great-great-grandson of Rabbi Meir "The Great" of Premishlan.
He was raised by his great uncle, the famous Rebbe Meir'l of Premishlan.
An extraordinarily large number of his descendants became Hasidic rebbes, including many around the world today.
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