Joseph de Leeuwe was a son of Louis de Leeuwe.
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On behalf of the Sicherheitspolizei in Zwolle, the police commissioner requested that 44 Jews suspected of having violated German regulations by temporarily changing their place of residence without the required authorization be located, detained and brought to trial. This description referred to Jews who had gone into hiding. Joseph de Leeuwe, a merchant, was one of these 44 people in hiding from Zwolle.
Algemeen Politieblad, nr 42, 16 October 1942, 1371-1372, notice 1901
According to the socalled Deathbooks of camp Auschwitz Joseph de Leeuwe died on 04-01-1943.