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Isaac Ossowski was born in 1877 in Lubraniez, near Warsaw, Poland, to an extremely devout family and Hasidim, with a long tradition of religious study and service, as hazan [cantors], shochet [ritual slaughterer], mohels [perform ritual circumcision], and sofers [scribes.] His father, Menahem, was a shochet and Isaac attended Yeshiva in Russia. He resettled in Germany, first in Frankfurt am Main, then in Berlin. He married Frieda Schwartzbardt, born in 1888. They had three sons, Joseph, (1915-2011), Leo (b. 4/1/1913), and Sol (1919-2011), and one daughter, Nettie. Rabbi Ossowski became head shochet, overseeing the ritual slaughter of animals in Berlin. He also served as hazan, mohel, and sofer for the Alte Shule [Old Synagogue]. After Hitler was appointed Chancellor in 1933, the persecution of Jews became official government policy. Rabbi Ossowski and members of his family were interrogated several times by the SS (Schutzstaffel; Protection Squadrons) who gathered intelligence on opponents of the Nazi state and policed racial purity. In 1934, due to the threatening anti-Semitic climate of the Nazi state, he sent his young son, Sol, to Lithuania to study at a yeshiva. In 1938, Rabbi Ossowski, with his wife and daughter, escaped Nazi Germany for the United States. They joined their sons, Joseph and Leo, who had settled in the United States in 1936. Their son, Sol, joined them in the United States in 1939 after completing his rabbinical studies in England. Rabbi Ossowski, 66, died in Ohio in 1943.

United States Holocaust Memorial Museum Collection, Gift of Sol Oster