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He is married to Johanna Petronella Jacoba Maas.
They got married on September 29, 1915 at Leiden, he was 25 years old.Source 2
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Willem Christoffel de Wekker | ||||||||||||||||||||||||||||||||||||
1915 | ||||||||||||||||||||||||||||||||||||
Johanna Petronella Jacoba Maas | ||||||||||||||||||||||||||||||||||||