Gender: girl
School:
School #4A
When I searched for Chaja Grobczak there was only one similar sounding name that was born between the years 1929 and 1934. Her name was Chaja GRUBCZAK born 2 March 1933 and she lived at SCHLOSS 5 8 and WOLCZANSKA 52. She also appears as Chaja GRABCZAK.
I found Szlama Grabszak/Grubczak born 22 Oct 1907, Miriem Grabczak born 1906 and died 20/11/1942, and Sara born 12 March 1938 all living at the same address as Chaja. I found a page of testimony for Slzama and it says he and his daughters perished but doesn't say where or when.