Jacob Halbes Feenstra, born on August 31, 1779, christened in Harlingen on January 18, 1780, son of Halbe Baukes Feenstra (peat barge proprietor and bargeman) and Doetje Jacobs, peat barge proprietor and worker, died in Leeuwarden on June 3, 1857, aged 77 years.

Jacob was married in Wartena on September 10, 1809 in church, at the age of 30 to
Froukje Watzes Pruiksma alias Froukje Pruik (aged 29 years), born in Joure on November 17, 1779, christened there on December 2, 1779, daughter of Watze Arjens and Aafke Sietses, died in Leeuwarden on August 31, 1871, aged 91 years.

• 1 : Doetje Jacobs Feenstra, born in Harlingen on May 7, 1810, christened there on May 27, 1810.
  Doetje was married in Leeuwarden on May 17, 1835, at the age of 25 to Harmanus Engelbertus de Vries (aged 24 years), born on June 24, 1810, christened in Harlingen on July 1, 1810.
  

• 2 : Aafke Jacobs Feenstra, born in Harlingen on November 26, 1811, died there on January 23, 1875, aged 63 years.
  Aafke was married in Leeuwarden on July 18, 1847, at the age of 35 to Hubert Snijders (aged 24 years), born in Leeuwarden on June 9, 1823.
  

• 3 : Sytske Jacobs Veenstra, born in Harlingen on November 9, 1813, died in Leeuwarden on February 9, 1876, aged 62 years.
  Sytske was married in Leeuwarden on December 20, 1835, at the age of 22 (1) to Sjierk Hendriks Bouma (aged approximately 25 years), born in Sneek circa 1810, son of Hendrik Sierks Bouma and ,arijke Pieters Bloksma, died in Leeuwarden on January 10, 1854, aged approximately 44 years.
  Sytske was married in Leeuwarden on July 15, 1857, at the age of 43 (2) to Arjaan Arjaans (aged 44 years), born in Leeuwarden on October 17, 1812, son of Dirk Arjaans and Jantje Everts.
  

• 4 : Halbe Jacobs Veenstra, born in Tietjerksteradeel on November 3, 1815, died in Amsterdam on July 17, 1849, aged 33 years.
  

• 5 : Yemkje Jacobs Feenstra, born in Harlingen on February 8, 1818, died in Leeuwarden on October 24, 1900, aged 82 years.
  She had from an unknown man one daughter.
  Yemkje was married in Leeuwarden on May 31, 1848, at the age of 30 (2) to Christiaan Dikkeschey alias Christiaan Dikkescheid (aged 33 years), born in Leeuwarden on July 30, 1814, son of Frans Dikkescheid and Antje Sjoerds, died there on May 26, 1871, aged 56 years.
  

• 6 : Watze Jacobs Veenstra, born in Harlingen on May 31, 1820, died in Leeuwarden on August 17, 1821, aged 1 year.
  

• 7 : Watze Jacob Feenstra, born in Leeuwarden on August 16, 1822, barge hand, bargeman and baker's man, died in Leeuwarden on November 26, 1885, aged 63 years.
  Watze was married in Leiden to Anna Geertruida van Berkel, born in Leiden on November 15, 1828, died in Leeuwarden on December 1, 1912, aged 84 years.