1913 - 1974 (61 years)
| Nelson van Dyk 1939-2012 |
| Nelson van Dyk | |
| B: | 19 Apr 1939 |
| Swartberg, Kaap, Suid-Afrika | |
| D: | 3 Apr 2012 |
| Harrismith, Vrystaat, Suid-Afrika | |
| Gert Willem du Plooy 1913-1974 |
| Gert Willem du Plooy | |
| B: | 5 Jan 1913 |
| Hobhouse, Vrystaat, Suid-Afrika | |
| D: | 8 Nov 1974 |
| Sasolburg, Vrystaat, Suid-Afrika | |
 | Frederika Elizabetha de Klerk -Yes, date unknown |
| Frederika Elizabetha de Klerk | |
| M: | Thaba Nchu, Vrystaat, South Africa |
| D: | Yes, date unknown |
