Willemke Sybrens Sleeper, born in Harlingen on November 17, 1828, daughter of Sybren Sipkes Sleeper and Aaltje Wiegers Mossel, died there on June 16, 1912, aged 83 years.

Willemke was married on May 5, 1853, at the age of 24 to
Johannes Innes Wijga (aged 22 years), born in Harlingen on February 22, 1831, son of Inne Wijga and Trijntje Wielsma, died on June 19, 1897, aged 66 years.

• 1 : Jacob Wijga, born in Wonseradeel on August 26, 1861, 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.