Harm Holsteijn, born in Groningen on September 5, 1836, son of Pieter Holsteijn (cabinetmaker and cabinetmaker) and Jantje Luitjes van der Heide (maid servant), carpenter, carpenter and carpenter.

Harm was married in Groningen on May 20, 1866, at the age of 29 to
Grietje Rijkens (aged 33 years), born in Wildervank on November 21, 1832, daughter of Douwe Rijkens (barge hand, bargeman and barge hand) and Willemina Spier (maid servant), maid servant.

• 1 : Jantje Holsteijn, born in Groningen on February 8, 1867, died there on August 19, 1966, aged 99 years.
  Jantje was married in Groningen on April 25, 1887, at the age of 20 to Gerhardus Kijlstra (aged 23 years), born in Drachten on July 22, 1863, son of Egbert Gerhardus Kijlstra (grutter) and Saakje Teyes Brandsma, vleeschhouwer, died in Groningen on February 14, 1927, aged 63 years.
  

• 2 : Pieter Holsteijn, born in Groningen on February 22, 1870, bediende and bediende.
  Pieter was married in Groningen on April 23, 1899, at the age of 29 to Tjakomina Egberta Kram (aged 26 years), born in Groningen on July 20, 1872, daughter of Derk Kram (warehouseman) and Roelina Werkman.