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 | John Sweet van Dyk (1876-1947)
|
 | Maria Johanna Cornelia Avenant (1884-1920)
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| Maria Johanna van Dyk (1910- ) |
| John Swede van Dyk (1917-1993)  |
| Joseph Daniël van Dyk (1918-1983)
|
| Ann Helen du Preez (1923-1978) |
| Helen Elizabeth van Dyk (1948-2011) |
| Johan Daniël van Dyk (1951-1988) |
