Kalman Huberman was born in Wloclawek, Poland to Roiseh and Ephraim. He had two older sisters, Henia and Anna. In 1939, the family was forced to move to a part of Warsaw that would later become the Warsaw Ghetto. In 1941 Anna escaped the Ghetto. In the spring of 1942, after multiple attempts, Kalman also escaped and joined his sister on a farm in Ozarow, where Jewish people still remained in their homes. In September of 1942, the Jews were rounded up from Ozarow, and Anna and Kalman were separated. Anna survived a forced labor camp at Auschwitz, but never saw Kalman again.