Sybrigje Ypes Poortinga, born circa 1858 (?).

Sybrigje was married in Dantumadeel on October 20, 1881, at the age of approximately 23 to
Kornelis Gerbens van Wieren (aged 21 years), born on June 5, 1860, son of Gerben Reinders van Wieren and Ybeltje Kornelis Ferwerda, died in Bolsward on January 2, 1937, aged 76 years.

• 1 : Saakje Kornelis van Wieren, born in Janum on December 21, 1881.
  Saakje was married in Ferwerderadeel on May 27, 1911, at the age of 29 to Titus Damsma (aged approximately 26 years), born in Genum circa 1885 (?).
  

• 2 : Ybeltje Kornelis van Wieren, born on February 5, 1883.
  Ybeltje was married in Dantumadeel on May 9, 1912, at the age of 29 to Melle Castelein (aged approximately 26 years), born circa 1886 (?).
  

• 3 : Jelske Kornelis van Wieren, born on October 5, 1885.
  Jelske was married in Dantumadeel on April 24, 1913, at the age of 27 to Alle Groenhof (aged approximately 26 years), born circa 1887 (?).
  

• 4 : Trijntje Kornelis van Wieren, born in Dantumadeel on June 30, 1889.
  Trijntje was married in Dantumadeel on April 30, 1914, at the age of 24 to Hedzer Castelein (aged approximately 26 years), born circa 1888 (?).
  

• 5 : Gerben Kornelis van Wieren, born on April 5, 1891.
  Gerben was married in Dantumadeel on July 24, 1917, at the age of 26 to Aaltje van der Velde (aged approximately 22 years), born circa 1895 (?).