Given name: Mietek Family name: Gryngruz

Idel and Mira's son; had three sisters - Rysia, Doba and Sonia, his parents were deaf-and-dumb; before the ghetto was formed lived in Praga at Brzeska Street No. 11, flat 42 in one room with a kitchen, then at Zelazna Street No. 75 a, flat 48; was a terrible urchin, but had a liking for books of travel and adventure; his parents had a strong influence on the shaping of his views, especially his father - by trying to develop his courage, bravery, humanism, respect for work and a sense of justice; in 1940 worked in a shoe factory with his father.