- Document ID: 132057855
- Document Collection: 7-14-1 Documentation of the CLI
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https://www.maxvandam.info/humo-gen/family/1/F49307?main_person=I128390
https://stolpersteine-dordrecht.nl/het_voorbije_joodse_dordrecht_betje_elsas.html
Judith Roeper (1902 - 1982) - Genealogy (geni.com)
Son: Machiel Zilverberg