 | Johannes Hendrik Hattingh van Dyk (1894-1930) 
|
| Gideon van Dyk (1921-1973)  |
| Johannes Hendrik van Dyk (1923- ) |
| Abraham Paulus van Dyk (1926-1978) |
 | Magdalena Dorothea van Dyk (1928-1988) |
| Geoffrey William Renold de Smidt ( -1971) |
| Martha Johanna Catharina de Graaf ( -1973) |
| Sybrand Barend Jacobus van Dyk (1919-1980)
|
| Elaine Patricia de Smidt (1929-1972)
|
