Douwe Tjerks Douma, born in Jutrijp on January 4, 1848, son of Tjerk Douwes Douma (carpenter's man) and Janneke Bokkes Bokman, carpenter, died in Oosterwierum on June 25, 1900, aged 52 years.

Douwe was married in Baarderadeel on May 15, 1878, at the age of 30 to
Trijntje Ottes Feenstra (aged 23 years), born in Wartena on November 25, 1854, daughter of Otte Wybes Feenstra (bargeman, worker, bargeman and worker) and Johanna Oepkes Bouwma, died in Oosterbierum on October 18, 1937, aged 82 years.

• 1 : Tjerk Douma, born in Baarderadeel on March 4, 1879, died there on May 29, 1884, aged 5 years.
  

• 2 : Johanna Douma, born in Baarderadeel on April 23, 1880, died there on November 22, 1880, aged 213 days.
  

• 3 : Johanna Douma, born in Baarderadeel on September 28, 1881, died there on June 21, 1939, aged 57 years.
  

• 4 : Tjerk Douma, born in Baarderadeel on June 29, 1884.
  

• 5 : Otte Douma, born in Baarderadeel on January 23, 1886.