Jacob Wijga, born in Wonseradeel on August 26, 1861, son of Johannes Innes Wijga and Willemke Sybrens Sleeper, died in Harlingen on May 15, 1890, aged 28 years.

Jacob was married in Harlingen on May 15, 1890, at the age of 28 to
Anna van Zandvoort (aged approximately 22 years), born circa 1868 (?), daughter of Johannes van Zandvoort and Berendtje Huizinga.

• 1 : Willemke Wijga, born in Harlingen on February 13, 1891, died there on November 24, 1955, aged 64 years.
  Willemke was married in Harlingen on November 11, 1909, at the age of 18 to Age Ploegstra (aged 22 years), born in Harlingen on April 27, 1887, son of Age Ploegstra (butcher) and Sjouwkje Olivier, died in Harlingen on October 11, 1978, aged 91 years.