Sytske Ulbes, born circa 1742 (?).

Sytske was married to
Sybren Uilkes Visker, born circa 1738 (?).

• 1 : Aurelia Sybrens Visser, born in Wartena on July 11, 1765, christened there on July 29, 1765, died there on May 6, 1841, aged 75 years.
  Aurelia was married in Wartena on April 25, 1791 in church, at the age of 25 to Gerrit Wybes Feenstra (aged 21 years), born in Eernewoude on April 1, 1770, christened there on May 6, 1770, son of Wybe Baukes and Gerlske Ottes, peat cutting supervisor, died in Wartena on December 11, 1848, aged 78 years.