Jan Wybrens van Haga, born in Sneek on February 11, 1867, son of Wybren Reinouts Petrus' van Haga (merchant, tabaksfabrikant (1876/1882), tabakskerver (1885) and tobacco manufacturer) and Baukje Gaastra, apotheker te Workum, died on February 2, 1916, aged 48 years.

Jan entered a notice of marriage on October 4, 1899 and was married in Idaarderadeel on October 19, 1899, at the age of 32 to
Maria Burgij (aged 25 years), born in Anjum on April 5, 1874, daughter of Durk Burgij (notaris) and Engeltje Zandstra, died in Leeuwarden on November 26, 1924, aged 50 years.

• 1 : Engelina van Haga, born in Workum on July 22, 1900, died there on November 29, 1900, aged 130 days.
  

• 2 : Engelina van Haga, born in Workum on October 31, 1901, died in Solo on March 1, 1945, aged 43 years.
  Engelina was married to G.A. Visscher, luitenant bij het K.N.I.L..
  

• 3 : Dirk Casper van Haga, born in Workum on January 13, 1903, died in Grande Prairie on October 19, 1994, buried in Debolt, aged 91 years.
  Dirk was married in Friens on May 10, 1924. He was married there in church, at the age of 21 (1) to (and divorced from) Reinskje Boersma (aged approximately 22 years), born circa 1902 (?), died after 1975, aged at least 73 years.
  Dirk was married in Abbotsford on December 23, 1936, at the age of 33 (2) to N.N..
  

• 4 : Wiebren Reinouts van Haga, born in Workum on July 27, 1904, oud-gezagvoerder ter koopvaardij, died in Oostvoorne on November 12, 1985, buried in Rotterdam-Overschie, aged 81 years.
  Wiebren was married to Hendrika Klasina Ates, born in Rotterdam on March 7, 1903, daughter of Hendrikus Ates and Grietje Dijkstra, died in Oostvoorne on September 12, 1990, aged 87 years.