Louis (Wim) Katan and his wife Albertine (Riet/Tini) Vogel survived the war in Boxtel under false identities: William Alfred Engels and Maria van de Berg
See:
and
He helped allied airmen to escape:
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https://data.jck.nl/search/?qf=nave_objectSoort%3Agrafiek&q=&qf[]=nave_objectSoort%3Abrief&page=76
Brother: Richard Katan
See: