Tryntje Sjieuwkes Terpstra, born circa 1804 (?).

Tryntje was married to
Feike Sibrens Plekker, born circa 1800 (?).

• 1 : Sibren Feikes Plekker, born in Franekeradeel on June 7, 1827, kilnman, died before October 16, 1912, aged at most 85 years.
  Sibren was married in Franekeradeel on October 3, 1853, at the age of 26 to Aaltje Wytses Zijlstra (aged 24 years), born in Franeker on November 8, 1828, daughter of Wytse Annes Zijlstra and Aafke Floris Visser, died in Harlingen on October 16, 1912, aged 83 years.