Sytske Freerks, born before October 11, 1767, christened in Eernewoude on October 11, 1767, daughter of Freerk Lykles and Antje Baukes.

Sytske entered a notice of marriage in Harlingen on September 15, 1792. She was married there on September 23, 1792 in church, at the age of at least 24 to
Olphert Symons (aged 27 years), christened in Hindeloopen on October 3, 1764, son of Simon Olferts and Jan Tones, bargeman, died in Harlingen on January 10, 1831, aged 66 years.

• 1 : Janna Olpherts, born in Harlingen on September 30, 1793, christened there on October 15, 1793.
  

• 2 : Freerik Olpherts, born in Harlingen on December 8, 1795, christened there on December 22, 1795.
  

• 3 : Simon Olpherts, born in Harlingen on November 26, 1798, christened there on December 11, 1798.
  

• 4 : Lykle Olpherts Duiker, born in Harlingen on June 2, 1802, christened there on June 15, 1802, clerk and deurwaarder der directe belastingen, died in Harlingen on November 30, 1871, aged 69 years.
  Lykle was married in Harlingen on February 23, 1837, at the age of 34 to Elisabeth Eeltjes Tichelaar (aged 24 years), born in Harlingen on October 16, 1812, daughter of Eeltje Cornelis Tichelaar (cooper and meester kuiper) and Feijkje Tjamkes Blombergen, died in Harlingen on April 20, 1895, aged 82 years.
  

• 5 : Antje Olpherts, born in Harlingen on September 19, 1805, christened there on October 1, 1805.