Trying to find out the married family name of Rav Yitzchok Eizik Liebes of the Rabbinical Alliance of America's sister, Frieda (married Eliyahu Zvi son of Yitzchak Zeev - I believe should be Soloveitchik - who perished). Who was the father of Yitzchak Zeev and where was he a Rav? Neil Rosenstein
