Jacob Meir Biderman
Rabbi Jacob Meir Biderman (1870-1941)  was the president of Kolel Polen (Poland)(קופת רבי מאיר בעל הנס - כולל פולין), in 1935 was appointed to the board of Rabbis of the Warsaw community, along with Rabbi Menachem Zemba and Rabbi Avraham Weinberg.
Born in the town of Lubicz (Lubitsch) 6 Sep 1869, to his father Rabbi Nathan Solomon Betzalel Biderman, Rabbi of the town. His grandfather was Rabbi Yaakov Dovid Rabbi Koznitz and Weishegrad.
Was son In-law of Rabbi Yehuda Aryeh Leib Alter of Ger “Sfat Emes”, and in-law of Rabbi Avraham Mordechai Alter, the "Imrei Emes" and his son Rabbi Yisrael Alter, the "Beis of Israel" the Rebbe of Ger. and the grandfather of rabbi Pinchas Menachem Alter.
In his late years he suffered from diabetes, but even then he continued his studies and his teaching. In 1940, with the establishment of the Warsaw ghetto, his health worsened due to lack of drugs and under suitable conditions, and on 08,06,1941 died and was buried next to the Warsaw hospital.
He married Ester Alter(d. 1 Oct 1943) in 1884
Daughter Feige Mintche Biderman (b. 28 Jan 1890) m. (1922) her uncle Rabbi Avrohom Mordechai (b. 25 12.1866 Gora Kalwaria “Gur” Poland, d. 3 Jun 1948 Jerusalem) She was his second wife.
Son Rabbi Yitzchak David Biderman
Daughter Biderman m. her cousin Rabbi Pinchas Yaacov HaCohen Levin
Children of The Pnei Menachem
Rabbi Yaakov Meir Alter, Harav Shaul Alter of Sfas Emes Yeshiva, Rabbi Yitzhak David Alter, Rabbi Daniel Chaim Alter, Rabbi Yehuda Arye Alter m. daughter of Menashe Klein, Daughter Ester m. Rabbi Dov Berl Lipel.
הגאון רבי יעקב מאיר בידרמן זצ"ל בית יעקב 69, שבט תשכ"ה, עמ' 7-6