Jan de Jong, born in Pingjum on March 8, 1887, son of Douwe Jans de Jong (worker) and Trijntje Jorritsma, worker Netherlands Railroads, died in Deinum on July 10, 1939, aged 52 years.

Jan was married in Franekeradeel on November 9, 1912, at the age of 25 to
Klaaske Belksma (aged 24 years), born in Tzum on August 2, 1888, daughter of Meindert Belksma and Maartje Vermeer, died in Leeuwarden on January 16, 1989, aged 100 years.