Grietje Ypma, born in Franeker on January 17, 1847, daughter of Theodorus Ypma and Stientje Canter Visser.

Grietje was married in Utingeradeel on March 7, 1869, at the age of 22 to
Auke Atzes van der Ploeg (aged 24 years), born in Akkrum on April 29, 1844, son of Atze Aukes van der Ploeg (carpenter's man) and Jitske Wybes Feenstra (maid servant).