Klaas Rommerts Tigchelaar, born in Wijnaldum on August 24, 1856, son of Rommert Klases Tigchelaar (farmhand and worker) and Baukje Jans Dijkstra (woman worker), worker, died in Wijnaldum on March 22, 1942, aged 85 years.

Klaas was married in Barradeel on May 20, 1882, at the age of 25 (1) to
Jantje van der Zee (aged 23 years), born in Midlum on March 31, 1859, daughter of Sybren Jacobs van der Zee (worker) and Geertje Abrahams Boonstra (woman worker), died in Midlum on March 26, 1918, aged 58 years.

• 1 : Rommert Tigchelaar, born in Midlum on April 3, 1884, worker, died on November 9, 1971, aged 87 years.
  Rommert was married in Barradeel on May 16, 1908, at the age of 24 (1) to Dirkje Posset (aged 21 years), born in Midlum on December 20, 1886, daughter of Pier Theodorus Posset and Hiltje Postma, maid servant, died circa 1920, aged approximately 34 years.
  Rommert was married circa 1921, at the age of approximately 37 (2) to Maria Johanna Geertruida Vrijling (aged approximately 24 years), born in Dokkum on August 5, 1897, died in December 1981, aged 84 years.
  

• 2 : Sybren Tigchelaar, born in Wijnaldum on April 10, 1887, shopkeeper, grocer and casual labourer, died in Sexbierum on April 3, 1959, aged 71 years.
  Sybren was married in Schoterland on October 6, 1910, at the age of 23 to Trijntje Groen (aged 24 years), born in Rohel on September 6, 1886, daughter of Andries Groen and Antje Poepjes, died in Sexbierum on May 20, 1976, aged 89 years.
  

• 3 : Baukje Tigchelaar, born in Wijnaldum on April 23, 1889, died there on April 9, 1919, aged 29 years.
  Baukje was married in Barradeel on May 20, 1911, at the age of 22 to Johannes Snijder (aged 26 years), born in Dongjum on April 18, 1885, son of Dirk Snijder (farmer's hand and worker) and Tietje Brouwer, worker and farm worker, died in Franeker on February 14, 1970, buried in Wijnaldum, aged 84 years.
  

• 4 : Geertje Tigchelaar, born in Wijnaldum on September 30, 1891, died in Bellingwedde on January 14, 1973, buried in Groningen on January 18, 1973, aged 81 years.
  Geertje was married in Westdongeradeel on April 11, 1914, at the age of 22 to Yme de Beer (aged 29 years), born in Ternaard on June 14, 1884, son of Abe Freerks de Beer (worker) and Sijtske IJmes Bergmans, worker, died in Bellingwedde on November 17, 1976, buried in Groningen on November 19, 1976, aged 92 years.
  

• 5 : Jan Tigchelaar, born in Wijnaldum on May 29, 1893, died there on September 18, 1893, aged 112 days.
  

Klaas was married in Barradeel on September 20, 1919, at the age of 63 (2) to
Klaaske Klazes Helfrich (aged 55 years), born in Kimswerd on October 22, 1863, daughter of Klaas Jans Helfrich (worker and worker) and Japke Dirks Ruim, died in Tzummarum on December 1, 1947, aged 84 years.
Klaaske was married before in Wonseradeel on July 9, 1887, at the age of 23 to Auke Deinum (aged approximately 26 years), born circa 1861 (?).