Klaartje Magnus was a daughter of David Magnus and Margje Levie. She married in Amsterdam on 8 March 1911 to Isaac de Leeuw, a son of Gerard Isaac de Leeuw and Leentje van de Kar.
Also her siblings Simon, Zientje, Grietje, Jacob David, Saartje, Mozes, Nathan and Jozef have been killed during the Holocaust.
Drenlias en website www.wiewaswie.nl.