Given name: Leon Family name: Grynbaum

Comes from a wealthy merchant family from Nalewki Street. He finished a high school. Before the uprising, he used to sell weapons. He armed himself and his parents' shelter in the cellar of the house at Zamenhofa Street No. 24 (in front of the building they had a shop). During the uprising, there were hiding together with a few other merchant families. At the end of May, Germans discovered the shelter and let the gas in. Grynbaum's sister got poisoned and as a result she died, his brother-in-law died, Leon was hiding alone in the neighbouring house in Nalewki Street. On 6 June he joined Najberg's group