Sientje de Beer-Wurms was a daughter of Margaretha Les-Jas from a first marriage.
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Sientje Wurms married on 21 July 1942 in Amsterdam to Louis Samuel de Beer, who was still registered on the address of his parents.
Municipal Archive of Amsterdam, archive card of Sientje Wurms.
Sientje Wurms worked as a seamstress with the lingerie- and ready-made clothing company SIDVA (Simon de Vries Ateliers) in Amsterdam in October 1941.
She then had been in office for two years.
Lijst van Joodsch Personeel-SIDVA Oct. '41