1923 - 1971 (48 years)
| Martienus Roedolf van Dyk 1979-1979 |
| Martienus Roedolf van Dyk | |
| B: | 4 Mar 1979 |
| D: | Mar 1979 |
| Willem Abraham van Dyk 1980-1999 |
| Willem Abraham van Dyk | |
| B: | 31 Mar 1980 |
| D: | 3 Aug 1999 |
| Johannesburg, Gauteng, South Africa | |
|
| Martienus Roedolf van Dyk 1923-1971 |
| Martienus Roedolf van Dyk | |
| B: | 26 Apr 1923 |
| D: | 3 Jun 1971 |
 | Elizabeth Vorster 1923-2013 |
| Elizabeth Vorster | |
| B: | 5 Nov 1923 |
| Elliot, Kaap, Suid-Afrika | |
| D: | 11 Feb 2013 |
| Somerset Oos, Kaap, Suid-Afrika | |
