I ran a DM Soundex search for "Bronia Chmiel" and found two results. Both results had the same spelling, and were born the same year (Brajna Chmiel, 1930), and were born on the same date (the 21st), but one's birthdate was in April, and the other in June. Both results shared a street address (BIER 53), but each also had another street address. The "Brajna Chmiel" born 21 April 1930 had addresses BIER 53 13 and LITZMAN 88 listed, while Brajna Chmiel born 21 June 1930 had addresses SPERLING 8 5 and BIER 53.
The fact that both of these entries shared a number of details leads me to believe that they are perhaps the same person, Bronia Chmiel, and the discrepancies may stem from, for example, illegibility of the handwriting.
I also noted that she was deported on 10 September 1942, most likely to Chelmno. She would have been 12 years old.
In an effort to find potential family members, I ran an exact search for the last name "Chmiel". Upon looking through the results, I found four in total (aside from Brajna) that shared the same addresses. These addresses, along with their birth dates, led me to believe that Dawid and Rojza were Brajna's parents, and Henoch Ber and Hadase Milkele her siblings.
Brajna shares the deportation date of 10 September 1942 with her father and baby sister. This deportation was most likely to Chelmno.