Johannes getrouwd Tetje HERDER on 24 sep 1876inGaasterland(Friesland).. Tetje (dochter van Franke HERDER en Baukjen Willems DOLSTRA) was born on 15 mrt 1852 in Doniawerstal(Friesland); stierf on 12 apr 1920inGaasterland(Friesland).. [Gezinsblad]
Kinderen:
Baukje KOORNSTRA was born on 29 apr 1876 in Gaasterland(Friesland)..
Jelle KOORNSTRA was born on 17 feb 1878 in Gaasterland(Friesland).; stierf on 9 feb 1933inSneek(Friesland).
Elisabeth KOORNSTRA was born on 21 dec 1880 in Gaasterland(Friesland).; stierf on 16 feb 1883inGaasterland(Friesland)..
Elisabeth KOORNSTRA was born on 10 jul 1883 in Gaasterland(Friesland).; stierf on 28 Okt 1888inGaasterland(Friesland)..
Antje KOORNSTRA was born on 18 jan 1887 in Gaasterland(Friesland)..