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 | Joseph Sybrand van Dyk (1815- )
|
 | Gertruida Maria Bester (1815-1842) |
| Gertruida Maria Wilhelmina van Dyk (1841- )  |
| Joseph Johannes Sybrand van Dyk (1840-1861)
|
| Wilhelmina Christoffelina Potgieter (1845-1897) |
