Mathilde Rosenbaum was a daughter of Nathan Isack Rosenbaum and Eva Schwarz. She married Louis Schwarz in 1896 in Winterswijk. He passed away on 9 January 1940. Mathilde Rosenbaum and Louis Schwarz had two children who died in infancy.
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When the war started Mathilde Rosenbaum had five children, among whom David Abraham. Only her youngest child survived the war. For a biographical note see: H.E. Dominicus, Mauthausen. Een gedenkboek (2e herziene en uitgebreide druk; Amsterdam 1999) 140.