Kabbalist,  served  as Rabbi of Volkovisk, Tiktin, and Suvalki .

Called Yitzchak Eizik Chaver - Wildmann .

Rabbi Yitzchak Eizik Chaver of Suwalk was Yitzhak Isaac Segal's grandfather.  Segal named his daughter Shprintze after his grandmother, the wife of Yitzchak Eizik Chaver, and this name has repeated itself (as Nitza or Tzafi) to the present time.

Great scholar, religious authority and educator, a second-generation student of Gaon Eliyahu (Elija) of Vilna (1720-1787)."