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 among both Russian Ukrainian Jews.