Given name: Josef Family name: Lewartowski

He was born in 1895 in Bielsk Podlaski. Between 1918 and 1921 - an energetic activist of Poale Zion-Left. Then, he was active in the Communist Party of Poland (KPP), secretary general of the Jewish office at the KC KPP (Central Committee of KPP). In the ghetto, he was a KPP representative of the KC KPP. Also active in the Comintern (Communist International). Member of the Anti-fascist block in the Warsaw ghetto; he was an official associate one of the Centos (the Central Organisation for Orphan Care) orphanages. He even lived there for some time. Died.