Tjeerd Wijnstra, born circa 1853, carpenter's man and carpenter.

Tjeerd was married to
Elisabeth Schriemer, born circa 1863 (?), died before April 1, 1911, aged at most 48 years.

• 1 : Folkert Wijnstra, born in Oppenhuizen on October 5, 1886, tailor, died in Huizum on June 26, 1913, aged 26 years.
  Folkert was married in Leeuwarderadeel on April 1, 1911, at the age of 24 to Sjoerdtje Feenstra (aged 26 years), born in Warga on August 12, 1884, daughter of Sjoerd Gerrits Feenstra (barge hand, journeyman baker and warehouseman) and Harmke Joukes Tuinstra, died in Leeuwarden on August 14, 1965, aged 81 years.
  Sjoerdtje was married afterwards in Leeuwarderadeel on December 29, 1920, at the age of 36 to Tjalling Postma (aged 37 years), born in Veenwouden on December 5, 1883, son of Gosse Johannes Postma and Antje Tjallings van der Veen, died there on March 25, 1937, aged 53 years. Tjalling was married before in Dantumadeel on July 13, 1907, at the age of 23 to Fimke de Boer (aged approximately 19 years), born in Akkrum circa 1888, died in Veenwouden on November 22, 1918, aged approximately 30 years.