Arnold and Estella de Jong married in 1927 in Eindhoven.
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The Nijmegen police commissioner requested that Arnold de Jong, Estella de Jong-de Jong and their daughter Frederika Eva, residing in Nijmegen, be located, detained and brought to trial. They were suspected of having changed their place of residence without the required authorization. This description referred to Jews who had gone into hiding.
Algemeen Politieblad, nr 42, 22 October 1942, 1216, notice 2547