Sjoerdtje Dirks Dijkstra, born circa 1832 (?).

Sjoerdtje was married to
Jentje Sytses Katstra, born circa 1828 (?), died before September 13, 1877, aged at most 49 years.

• 1 : Wapke Katstra, born in Winsum on May 6, 1855, died in Arum on September 25, 1924, aged 69 years.
  Wapke was married in Wonseradeel on September 13, 1877, at the age of 22 to Folkert Andela (aged 33 years), born in Arum on May 24, 1844, son of Rein Klazes Andela and Klara Jetske Folkerts, died there on March 11, 1895, aged 50 years.
  Folkert was married before in Wonseradeel on May 8, 1869, at the age of 24 to Sjoerdtje Feikes Bergsma (aged 22 years), born in Cubaard on June 2, 1846, daughter of Feike Franses Bergsma (shoemaker, worker and shoemaker's hand) and Riemkje Sjoerds Bijlsma, died in Witmarsum on June 5, 1875, aged 29 years.