Natan Niewiadomski appears with the birthdate of 1934 and living at Alexhof 15 flat 27 and Hamburger 15 and moved on 15.12.42. He also appears as Natan Niewiadomska and living at Alexhof 15 flat 33 and a ghetto address that says, "Zabrano Ze Soba," and also a note that says, Syna. Not sure what they refer too.
Okay, I couldn't find any people living at Alexhof 15 27 but I did find possibly one living at Alexhof 15 flat 33. The woman was Cytla born 17/07/1899 and she had a address od Przpracy 1136 (note sure if an address or not?) I also found Gitla born 13/07/1899 and with the ghetto addresses of Mlynarska 3, and Alexhof 15, and a ghetto note of Hamburger 13. Then I also found Jakubowicz Gilta born 03/07/1894 and living at Alexhof 15 and Hamburger 13 flat 11 and a ghetto note of gest (died.) I'm guessing Jakubowicz was her maiden name and that they are all the same woman.
I couldn't find any referance to Przpracy 1136. I did a google search and I couldn't find anything. I also searched through the databases on the other stages and couldn't find anymore information on Natan or his mother.