Anna Trijntje Achterhof, born on July 23, 1926, daughter of Klaas Achterhof and Gepke de Boer.

She was married in Warffum on October 10, 1952 to
Frederikus Maring, born in Warffum on January 21, 1925, son of Geert Maring and Henderika van der Woude.

• 1 : Gerda Henderika, born in Warffum on September 17, 1955.
  She was married in Den Helder on October 24, 1980 to Petrus Hendriks, born in Den Helder on November 14, 1947, son of Petrus Hendriks and Catharina Maria Brinkman.
  

• 2 : Gerhard Klaas, born in Groningen on October 13, 1961.
  He was married in Zuidlaren on June 5, 1987 to Rieka Oosterhuis, born in Groningen on October 26, 1961, daughter of Klaas Gerardus Oosterhuis and Klaassina van Dijken.