Anna Maria Catharina Tjeenk Willink, born in Zwolle on January 22, 1853, died in Amsterdam on August 18, 1920, aged 67 years, daughter of Wolterus Everhardus Jonas Tjeenk Willink (boekhandelaar and uitgever) and Judith Geertruid Stroink.

Anna was married in Zwolle on February 13, 1873, at the age of 20 to
Ds. Pieter Feenstra (aged 22 years), doopsgezind predikant te Witmarsum-Pingjum 1873-8, predikant te Nijmegen 1881-91 and predikant te Amsterdam 1891-1916, born in Sappemeer on October 18, 1850, died in Amsterdam on August 16, 1936, aged 85 years, son of Ds. Pieter Feenstra (doopsgezind predikant te Sappemeer 1824-30, predikant te Leer 1830-37 and predikant te Sappemeer-Hoogezand 1837-71) and Pietje de Jong.

• 1 : Petronella Geertruida Feenstra, born in Witmarsum on December 3, 1873, died in Ommen on January 22, 1952, aged 78 years.
  Petronella was married to Herman Christiaan Knappert, burgemr van Heerjansdam, chef fa in Batavia, born in Schiedam on April 15, 1873, died in Zwolle on April 7, 1956, aged 82 years, son of Adrianus Knappert and Arnolda.
  Herman was married at the same time in Batavia (Ned. Indië) on December 10, 1933, at the age of 60 (2) to Marie Maminot.
  

• 2 : Mr. Pieter Feenstra, advocaat te Soerabaja, Batavia en Amsterdam and direkteur Centrale Trust Compagnie Amsterdam, born in Witmarsum on June 13, 1876, died in Aerdenhout on February 5, 1959, aged 82 years.
  Mr. was married in 's-Gravenhage on December 2, 1909, at the age of 33 (1) to (and divorced in 's-Gravenhage on May 16, 1918 from) Wilhelmina Henrietta Ramaer (aged 19 years), born in Soerabaja on November 25, 1890, died in Salzburg on December 12, 1980, aged 90 years, daughter of Mr. Johannes Wilhelmus Ramaer and Henriëtte Elisabeth Johanna Adriana Dorothea Koch.
  Wilhelmina was married afterwards to Walther Böhler.
  Mr. was married in Amsterdam on April 19, 1933, at the age of 56 (2) to Margareta Maria Herber (aged 25 years), born in München-Gladbach (Rijnprov.) on June 12, 1907, died in Aerdenhout on January 10, 2004, aged 96 years, daughter of Friedrich Wilhelm Herber and Maria Catharina Doerenkamp.
  

• 3 : Wolterus Everhardus Jonas Feenstra, gen.-agent Holl. Soc. van Levensverz., born in Witmarsum on January 12, 1878, died in Amsterdam on November 30, 1923, aged 45 years.
  Wolterus was married in Nijmegen on July 12, 1909, at the age of 31 to Elisabeth Stoffel (aged 26 years), born in Amsterdam on April 25, 1883, died in Deventer on April 15, 1945, aged 61 years, daughter of Cornelis Stoffel and Johanna Margaretha Dunlop.
  Elisabeth was married afterwards in Deventer on August 3, 1933, at the age of 50 to Izak Bessem.
  

• 4 : Judith Geertruid Feenstra, born in Witmarsum on April 27, 1880, died in Nijmegen on November 11, 1884, aged 4 years.
  

• 5 : Mr. Gerrit Feenstra, lid Raad van Justitie te Soerabaja, born in Nijmegen on June 8, 1882, died in Soerabaja on June 26, 1924, aged 42 years.
  Mr. was married in Weltevreden (Batavia) on March 10, 1921, at the age of 38 to Charlotte Ripassa (aged 21 years), born in Kalianda (Lamp.Distr.) (Indonesië) on April 9, 1899, died in Hilversum on January 16, 1973, aged 73 years, daughter of Josephus August Petrus Ripassa (deurwaarder) and Binah.
  

• 6 : Mr. Hermanus Diedericus Feenstra (R.N.L.), oud vice-pres. Gerechtshof te Amsterdam, born in Nijmegen on March 2, 1886, died in Vierhouten on December 24, 1967, aged 81 years.
  Mr. was married in Batavia (Ned. Indië) on December 8, 1917, at the age of 31 to Catharina Petronella Sluiter (aged 34 years), born in Meester Cornelis on September 7, 1883, died in Vierhouten on September 18, 1957, aged 74 years, daughter of Prof. Dr. Carel Philip Sluiter and Susanna Petronella Kraay.