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Helena Weinreb was the daughter of Chiel Weinreb and Rosa Weinreb-Gewürz (cf. http://www.joodsmonument.nl/person/543613/en), i.e. she belongs to the Weinreb family displayed separately. I do not know, however, if she actually passed through Westerbork at the same date as did her parents and her brother Ernst.
(Source: Relatives in Israel, 2013).
Westerbork, Hooghalen Deze straat heet tegenwoordig: Oosthalen 8Bezoek adrespagina