| | Johannes Wilhelmus Houkes 1915–1978 Bertha Margaretha Peters 1914–1999 | | |
| | Johannes Wilhelmus Houkes 1890–1949 Cornelia van Dijk 1887–1969 | | |
| | Hendrina Groenewald 1864–1935 Bartholomeus Jacobus "Bert" Houkes 1863–1951 | | |
| | Johanna Holleman 1842–1901 Petrus Groenewald 1837–1872 | | |
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