NGV Stambomenverzameling
Gezin: Jan Koens / Grietje Warringa (F8236)
Egbert Warringa (1852-1930) 
|
Grietje Berends (1858-1933)
|
Roelina Warringa (1883-1966)  |
| Warrink Warringa (1888- ) |
| Jeichien Warringa (1893-1939) |
| Wilmina Warringa (1896- ) |
| Jopkien Warringa (1900-1952) |
| Jan Koens (1875-1960)
|
| Grietje Warringa (1890- )
|
| Grietje Koens (1909-1952) |
