Jan Robijns de Jong, born in Tzum on April 27, 1822, son of Robijn Jans Arbeider (worker and worker) and Saackjen Gialts Kooistra, farmer's hand and worker, died in Pingjum on December 16, 1904, aged 82 years.

Jan was married in Wonseradeel on May 12, 1855, at the age of 33 to
Freerkjen Douwes Faber (aged 25 years), born in Pingjum on June 30, 1829, daughter of Douwe Jans Faber and Akke Brands Blanksma, maid servant, died in Pingjum on November 15, 1915, aged 86 years.

• 1 : Douwe Jans de Jong, born in Pingjum on September 29, 1859, worker, died in Makkum on April 21, 1944, aged 84 years.
  Douwe was married in Wonseradeel on May 22, 1886, at the age of 26 to Trijntje Jorritsma (aged 26 years), born in Pingjum on July 24, 1859, daughter of Eitte Steffens Jorritsma and Klaaske Klazes Wallinga, died there on January 2, 1934, aged 74 years.