Gender: girl
School:
School #8B
I did a fuzzy search for both the first and last name given. Two results came up and Mala Chajmowicz's birth year matched the birth years for the school, #8B, that Mala Hajmowicz attended, while the other name did not. Mala Chajomicz's occupation was also student making her a very possible candidate for Mala Hajmowicz.
Dawid Chajmowicz had the same same addresses as Mala Hajmowicz. His birth year was 1900 making it plausible that he is her father. Hanna Chajmowicz born in 1938 is most likely her sister because she has the same addresses as Dawid and Mala. The family members were found by doing an exact search on the surname, Chajmowicz.