Jacoba Tigchelaar, born in Harlingen on April 29, 1900, daughter of Gerben Tigchelaar (worker, merchant and fishmonger) and Klaaske Vogelzang (maid servant), telephone operator.

Jacoba was married in Harlingen on December 14, 1921, at the age of 21 to
Hendrik Kraay (aged approximately 27 years), born in Wassenaar circa 1894, son of Dirk Kraay (tailor) and Cornelia de Ridder, traveling salesman.