1927 - 1987 (59 years)
| John Joseph van Dyk 1977-Yes, date unknown |
| John Joseph van Dyk | |
| B: | 2 May 1977 |
| D: | Yes, date unknown |
| John Joseph van Dyk 1949-2020 |
| John Joseph van Dyk | |
| B: | 30 Jul 1949 |
| D: | 31 Jan 2020 |
| Vrystaat, Suid-Afrika | |
|
| Wilhelm Daniël van Dyk 1927-1987 |
| Wilhelm Daniël van Dyk | |
| B: | 16 Jun 1927 |
| D: | 25 May 1987 |
| Johannesburg, Transvaal, Suid-Afrika | |
 | Anna Josina Louw 1924-2006 |
| Anna Josina Louw | |
| B: | 5 Sep 1924 |
| M: | 4 Sep 1948 |
| D: | 6 Jan 2006 |
| Pretoria, Transvaal, Suid-Afrika | |
