Jouke Tjerks Tuinstra, born circa 1821, farmer's hand and worker.

Jouke was married to
Hiltje Wierds Postma, born circa 1824 (?).

• 1 : Harmke Joukes Tuinstra, born in Wartena on November 19, 1847, died in Huizum on January 17, 1921, aged 73 years.
  Harmke was married in Idaarderadeel on May 6, 1868, at the age of 20 to Sjoerd Gerrits Feenstra (aged 30 years), born in Wartena on October 24, 1837, son of Gerrit Ottes Feenstra (bargeman, baker, merchant, merchant and bargeman) and Antje Regnerus Seinstra (seamstress and baker), barge hand, journeyman baker and warehouseman, died in Warga on August 19, 1915, aged 77 years.