| | Johannes Wilhelmus Houkes 1915–1978 Bertha Margaretha Peters 1914–1999 | | | | Johannes Wilhelmus Houkes 1890–1949 Cornelia van Dijk 1887–1969 | | | | Bartholomeus Jacobus "Bert" Houkes 1863–1951 Hendrina Groenewald 1864–1935 | | |
| | | Willem Cornelis van Dijk – |
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| | | Maria Johanna de Beijer – |
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