 | Roeland Pieter Perold (1882-1946) |
 | Johanna Jacoba Seyffert (1882-1930) |
 | Johannes Louis Petrus van Dyk (1894-1979) 
|
| Agnes Lach (1904-1955)
|
| Agnes Julia Elizabeth van Dyk (1927- )  |
| Johannes Paulus van Dyk (1929- ) |
| Anna Elizabeth van Dyk (1931- ) |
| Paul Frederick van Dyk, (een van tweeling) (1938-2011) |
| Wilfred Jacobus van Dyk (1941-2007) |
| Johannes Jacobus Perold (1922- )
|
| Maria Wilhelmina Johanna van Dyk (1925- )
|
