Trying to make contact with the family of Esther (daughter of Rav Pinchas Chaim Biderman, son of the fifth Admor Lelov) who married Zvi Dor. Esther's sister was . Chana, born in Israel on 27 Jun 1922 and died on 29 Feb 2000 who married Nachum TEITELBAUM b. 14 Jan 1920 USA and died young in 18 Sep 1960.