Sjoerdtje Rinzes de Jong, born in Idaard on April 3, 1787, christened there on April 29, 1787, died in Grouw on August 27, 1823, aged 36 years.

Sjoerdtje was married in Huizum on May 6, 1810, at the age of 23 to
Regnerus Wiebes Seinstra (aged 28 years), born in Nes on June 4, 1781, christened in Oldeboorn on June 30, 1782, bargeman and bargeman, died in Grouw on October 31, 1862, aged 81 years.

• 1 : Antje Regnerus Seinstra, born in Grouw on March 24, 1812, seamstress and baker, died in Wartena on February 21, 1856, aged 43 years.
  Antje was married in Idaarderadeel on November 24, 1831, at the age of 19 to Gerrit Ottes Feenstra (aged 23 years), born in Wartena on February 16, 1808, christened there on February 28, 1808, son of Otte Wybes Feenstra (baker, baker, baker and baker) and Wypkjen Annes Hoeneveld, bargeman, baker, merchant, merchant and bargeman, died in Wartena on December 6, 1848, aged 40 years.
  Gerrit was married before in Idaarderadeel on May 24, 1828, at the age of 20 to Haakje Minzes Visser (aged 20 years), born in Eernewoude on December 25, 1807, christened in Garijp on February 7, 1808, daughter of Rinse Cornelis Visser (fisherman) and Trijntje Gerrits Brandsma (fisherman), maid servant, died in Wartena on March 31, 1829, aged 21 years.