Jan Rinzes Spijkstra, born circa 1849, workman and docker, died before June 8, 1927, aged at most 78 years.

Jan was married to
Lolkje Ypens Jansens, born circa 1852 (?), died before December 6, 1897, aged at most 45 years.

• 1 : Jantje Spijkstra, born in Huizum on June 1, 1875, died in Harlingen on June 7, 1927, aged 52 years.
  Jantje was married in Harlingen on December 6, 1897, at the age of 22 (1) to Gerrit Kroese (aged 24 years), born in Harlingen on August 8, 1873, son of Roelof Kroese (grain tallier) and Trijntje Martens, died in Harlingen on May 17, 1902, aged 28 years.
  Jantje was married in Harlingen on April 9, 1903, at the age of 27 (2) to Johannes van Seijst (aged 29 years), born in Harlingen on September 10, 1873, son of Gerrit van Seijst (workman) and Ymkje Reinsma, worker, gardener's hand and vegetable coster, died in Harlingen on April 22, 1963, aged 89 years.
  Johannes was married before in Harlingen on July 29, 1897, at the age of 23 to Rigtje Tigchelaar (aged 22 years), born in Harlingen on July 19, 1875, daughter of Gerrit Tjerks Tichelaar (worker, workman, barge hand and dock hand) and Hinke de Wit (maid servant), died in Harlingen on February 17, 1903, aged 27 years. Johannes was married afterwards in Harlingen on November 25, 1929, at the age of 56 to Maike Jansen (aged 51 years), born in Groningen on June 25, 1878, died after April 22, 1963, aged at least 84 years.