Given name: Josef Family name: Sak
A junior high school teacher. He was a member of the party Poale Zion-Right. He was in the ghetto. Later, he hid on the 'Aryan side'. After Ringelblum's death, he moved with his family to the flat prepared for Ringelblum in Izabelin. They survived the war.
in the index, Josef's surname is written with a Z