Marshak

Marshak, Marschak, Marchak, Marczak (Hebrew:מרש"ק‎) (Russian: МАРШАК or Марша́к) is a Jewish (Ashkenazic) surname, which is an acronym from the Hebrew expression Morenu Rabbi Shmuel Kaidanover - "our teacher Rabbi Samuel Kaidanover", after Aharon Shmuel ben Israel Kaidanover, a talmudic scholar and preacher from eastern Europe (Vilna, 1614 - Kraków, 1676). The surname occurs amongst Russian Jews and Ukrainian Jews.