Jewish Military Union
The Polish-Israeli authors of a 2011 book on the Jewish Military Union (ŻZW), Dariusz Libionka and Laurence Weinbaum, suggest that Iwański's story of heroism in the ghetto revolt is a fabrication and that he did not even have any male children. They point out that Iwański succeeded in convincing visiting journalists from abroad, most notably Chaja Lazar and Dan Kurzman, of the veracity of his story which is one of the reasons it gained credence and tremendous popularity.