Martha Margaretha Calff tried to escape to France in the summer of 1942 together with her boyfriend. The couple was caught and arrested near Tours. According to Le Memorial de la deportation des juifs de France, Martha Calff was deported from Drancy to Auschwitz on May 30, 1944. No further information is known about her. Her boyfriend survived the war.
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This person is commemorated on the monument Schaduwkade in Amsterdam. The names of the 200 jewish inhabitants of the Nieuwe Keizersgracht are placed on the canal wall opposite the houses where they once lived.