Frederik Feenstra, born in Wartena on May 30, 1872, son of Otte Gerrits Feenstra (barge hand and worker) and Hinke Hinnes de Jong, died in Leeuwarden on April 24, 1949, aged 76 years.

Frederik was married in Idaarderadeel on October 17, 1895, at the age of 23 to
Antje Venema (aged 25 years), born in Dragten on December 1, 1869, daughter of Douwe Taekes Venema (bargeman and worker) and Hiltje Andries Haarsma, died in Grouw on March 6, 1960, aged 90 years.

• 1 : Hiltje Feenstra, born in Grouw on December 10, 1895, died in Weststellingwerf on February 5, 1975, aged 79 years.
  Hiltje was married in Idaarderadeel on October 18, 1919, at the age of 23 to Frans Knol (aged 23 years), born in Oldeboorn on March 30, 1896, son of Harmen Geerts Knol and Soukje Heins van der Vliet.