Grietje Sybrens, born circa 1742 (?), died before May 16, 1790, aged at most 48 years.

Grietje was married to
Marten Sieberens, born circa 1738 (?), died before May 16, 1790, aged at most 52 years.

• 1 : Jelle Martens Hoekstra, born in Workum circa 1765, castellan and castelein, died in Workum on October 22, 1843, aged approximately 78 years.
  Jelle was married in Workum on May 16, 1790 in church, at the age of approximately 25 to Hendrikje Pieters (aged approximately 23 years), born circa 1767 (?), died after October 23, 1843, aged at least 76 years.