Janny Brandes-Brilslijper was born on 24 October 1916 in Amsterdam, Noord-Holland, Netherlands. She was married to Bob Brandes. She died on 15 August 2003 in Amsterdam, Noord-Holland, Netherlands.
From Westerbork, Janny, Lientje, and the Franks were transported to Auschwitz. Janny and Lientje were later transported to the Bergen-Belsen concentration camp, where Anne Frank and Margot Frank were also transported in October 1944. Janny, who was made a nurse in the camp, took care of the ill prisoners. In March 1945, Anne and Margot died within a few days of each other. Janny and Lientje buried them in the mass graves at the camp.