Jacobus Jans Bakker, born circa 1817, workman, sailor and warehouseman.

Jacobus was married to
Tietje Okles Hanja, born circa 1822 (?).

• 1 : Wilhelmina Bakker, born in Harlingen on March 26, 1845, died there on June 16, 1900, aged 55 years.
  Wilhelmina was married in the year 1866, at the age of 21 (1) to N.N. (aged approximately 26 years), born circa 1840 (?).
  Wilhelmina was married in the year 1869, at the age of 24 (2) to N.N. (aged approximately 26 years), born circa 1843 (?).
  Wilhelmina was married in Harlingen on August 26, 1875, at the age of 30 (3) to Jan Dreunhuizen (aged 33 years), born in Harlingen on October 18, 1841, son of Harmen Dreunhuizen (workman) and Eelkje Entes Bleeker, workman, died in Harlingen on December 23, 1926, aged 85 years.
  

• 2 : Jan Bakker, born in Harlingen on April 14, 1847, died before March 18, 1853, aged at most 5 years.
  

• 3 : Okle Bakker, born in Harlingen on June 18, 1851.
  

• 4 : Jan Bakker, born in Harlingen on March 18, 1853.
  

• 5 : Aurelia Bakker, born in Harlingen on August 5, 1856.