1870 - 1950 (80 years)
| Prof. Hendrik Bastiaan Davel 1896-1959 |
| Prof. Hendrik Bastiaan Davel | |
| B: | CA 1896 |
| Bethlehem, Vrystaat, Suid-Afrika | |
| D: | 15 Feb 1959 |
| Bloemfontein, Vrystaat, Suid-Afrika | |
 | Nell Louise van Dyke, (Amerikaner) 1897-1990 |
| Nell Louise van Dyke, (Amerikaner) | |
| B: | 2 Mar 1897 |
| M: | 7 Aug 1920 |
| Des Moines, Iowa, United States | |
| D: | 5 Mar 1990 |
| Pretoria, Transvaal, Suid-Afrika | |
| Oelof Abraham Izaak Davel 1870-1950 |
| Oelof Abraham Izaak Davel | |
| B: | 4 Apr 1870 |
| Richmond, Kaap, Suid-Afrika | |
| D: | 30 Jul 1950 |
| Bethlehem, Vrystaat, Suid-Afrika | |
| Cornelia Johanna van Helsdingen 1868-Yes, date unknown |
| Cornelia Johanna van Helsdingen | |
| B: | CA 1868 |
| M: | 18 Jun 1894 |
| Reitz, Vrystaat, Suid-Afrika | |
| D: | Yes, date unknown |
