Wiepkje de Groot, born in Harlingen on April 10, 1903, daughter of Tjerk de Groot and Anna Kwast.

Wiepkje was married in Harlingen on September 5, 1927, at the age of 24 to
Willem Postma (aged 29 years), born in Harlingen on April 20, 1898, son of Johannes Postma (bricklayer) and Grietje Bouwmeester, coppersmith.