Lykle Olpherts Duiker, born in Harlingen on June 2, 1802, christened there on June 15, 1802, son of Olphert Symons (bargeman) and Sytske Freerks, 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.

• 1 : Olfinus Frederikus Duiker, born in Harlingen on June 21, 1838.
  

• 2 : Sophia Volina Duiker, born in Harlingen on October 31, 1839, died there on February 4, 1843, aged 3 years.
  

• 3 : Sytske Duiker, born in Harlingen on March 29, 1841, died there on April 25, 1842, aged 1 year.
  

• 4 : Jantje Duiker, born in Harlingen on March 29, 1841, died there on July 23, 1842, aged 1 year.
  

• 5 : Eeltje Duiker, born in Harlingen on August 5, 1843, died in Udsire on April 3, 1862, buried there on April 6, 1862, aged 18 years.
  

• 6 : Sytske Duiker, born in Harlingen on December 8, 1845, died there on January 12, 1846, aged 35 days.
  

• 7 : Feikje Duiker, born in Harlingen on December 8, 1845, died there on August 25, 1846, aged 260 days.
  

• 8 : Simon Duiker, born in Harlingen on June 23, 1848, died in Leeuwarden on December 10, 1886, aged 38 years.
  

• 9 : Lykle Duiker, born in Harlingen on December 22, 1851, died there on August 2, 1852, aged 224 days.