Jan Koster, born in Franeker on June 18, 1840, son of Ernst Jans Koster and Trijntje Willems Geldersma, painter's man, died in Harlingen on February 23, 1918, aged 77 years.
Jan was married in Harlingen on May 17, 1866, at the age of 25 to
Elisabeth van der Wijk (aged 24 years), born in Harlingen on February 4, 1842, daughter of Jan Jans van der Wijk and Gerritje Foppes Molenaar, died there on January 15, 1890, aged 47 years.
From this marriage:
- 4 : Gerritje Elisabeth Koster, born in Harlingen on December 5, 1873, died there on January 31, 1936, aged 62 years.
Gerritje was married in Harlingen on May 31, 1897, at the age of 23 to Roelof Gerrits Tigchelaar (aged 27 years), born in Midlum on January 9, 1870, son of Gerrit Tigchelaar (worker, tilebaker and tilebaker's hand) and Jetske Folkerts van der Vliet (woman worker), potatodealer, workman, shopkeeper, bargeman, worker, workman and earthenware baker, died in Harlingen on January 3, 1932, aged 61 years.
- 6 : Jan Ernst Koster, born in Harlingen on September 16, 1876, died in Roermond on May 27, 1899, aged 22 years.
- 8 : Maria Elisabeth Koster, born in Harlingen on July 13, 1885.
Maria was married in Harlingen on May 14, 1906, at the age of 20 (1) to Gerard van Dijk (aged approximately 23 years), born circa 1883, died in Menaldumadeel on March 12, 1917, aged approximately 34 years.
Maria was married in Harlingen on February 28, 1918, at the age of 32 (2) to Jacob Smits (aged 29 years), born in Harlingen on February 5, 1889, son of Bouwe Smits (barge hand) and Hilligje Jacobs Knol (daily help), died in Harlingen on January 30, 1939, aged 49 years.
Jacob was married before in Harlingen on October 20, 1910, at the age of 21 to Jeltje Baarda (aged 18 years), born in Harlingen on March 9, 1892, daughter of Rimmert Baarda (workman, tileworker and casual labourer) and Jitske de Bruin, died in Harlingen on March 3, 1916, aged 23 years.