Rebecca Witsen was a daughter of Alexander Abraham Witsen and Aaltje Gans. She married Andries Adolf Arnold de Mark in 1891 in Weesp. He died in 1938. They had two children. A son Nathan died before the war. Rebecca lived from August 1940 until September 1941 on the Nieuwe Achtergracht 71 hs. She then moved to the Weesperstraat 35 I. Her last known address is the Jonas Daniël Meijerplein 18 II.
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