Bracha Katz (formerly Berta Weinhaber) was born on 28 March 1930 in Bratislava, Czechoslovakia. Her parents were Elias and Lea Weinhaber, and she had 6 brothers and sisters. Elias, descended from a long line of Rabbis, was the head of the Jewish community of Bratislava.
In April 1944, the Germans entered Bratislava and the Weinhabers were deported to the Sered camp. In June, they were sent to Auschwitz-Birkenau.
When they arrived at the ramp at Birkenau, a Jewish Kapo approached Berta, and told her to pretend that she and her brother Adolf were twins. Even though Adolf was 2 years her junior, the Germans believed them, and they were taken to the block where Mengele performed medical experiments on sets of twins. Berta managed to stay alive there until the liberation. Her brother could not withstand the intolerable conditions, and perished.
Berta was liberated by the Red Army on 27 January, 1945.
In 1949, she emigrated to Israel with her sister; they were the only members of the family who survived the Holocaust.
Today, she lives in Rehovot.