https://www.maxvandam.info/humo-gen/family/1/F23485?main_person=I104613
Betje de Leeuw (1911 - 1993) - Genealogy (geni.com)
https://archief.amsterdam/indexen/deeds/985333f2-1ba6-56a3-e053-b784100ade19?person=985333f2-1ba7-56a3-e053-b784100ade19
Fate relatives: https://www.joodsmonument.nl/en/page/123241/heiman-herman-de-leeuw
#typo #geo POR: [Hofmeyrstraat]