Our Family History
Gezin: Jacobus Jacobus van Hellemond / Grietje Kooyenga (62966899)
 | Marten Kooyenga (1884- ) |
 | Sjoukje Rienstra (1887-1965) 
|
| Tjitske Kooyenga (1907- )  |
| Ruurd Kooyenga (1910- ) |
| Jacobus Jacobus van Hellemond (1920-1999) |