Klaas Tigchelaar, born in Harlingen on September 30, 1875, son of Klaas Gerrits Tigchelaar (dock hand, workman and dock hand) and Grietje Dirks Sleeper van Arum (maid-of-all-work), docker, died in Harlingen on December 23, 1958, buried there, aged 83 years.

Klaas was married in Harlingen on June 5, 1899, at the age of 23 to
Antje Rienstra (aged 21 years), born in Almenum on September 3, 1877, daughter of Willem Jans Rienstra (worker) and Marijke Willems Alberda, maid servant, died in Harlingen on January 17, 1961, buried there, aged 83 years.

• 1 : Klaas Tigchelaar, born in Harlingen on October 30, 1899, locomotive polisher, died in The Hague on February 27, 1970, aged 70 years.
  Klaas was married before 1928, at the age of at most 29 (1) to (and divorced in the year 1928 from) Jantje de Vries (aged at most 25 years), born in Groningen on March 14, 1903.
  Klaas was married in The Hague on August 5, 1931, at the age of 31 (2) to Cornelia Alberts (aged 28 years), born in Groningen on March 5, 1903, died in The Hague on August 22, 1995, aged 92 years.
  

• 2 : Marijke Tigchelaar, born in Harlingen on April 8, 1901, died in Harderwijk on July 3, 1988, aged 87 years.
  Marijke was married in Harlingen on November 5, 1925, at the age of 24 to Lodewijk Engeler (aged 24 years), born in Harlingen on March 13, 1901, son of Sytse Engeler (dock hand) and Ymkje van Houten, casual labourer and laboratory assistant, died in Amsterdam on September 17, 1967, aged 66 years.
  

• 3 : Grietje Tigchelaar, born in Harlingen on March 24, 1903, died in Amsterdam on March 16, 1972, aged 68 years.
  Grietje was married in Amsterdam on December 19, 1929, at the age of 26 to Wessel Prins (aged 25 years), born in Purmerend on April 4, 1904, son of Arian Prins and Aaltje Muts, merchant and concrete worker, died in Amsterdam on July 21, 1967, aged 63 years.
  

• 4 : Willem Tigchelaar, born in Harlingen on August 6, 1905, colonial, died in Makkum on December 18, 1980, buried in Leeuwarden on December 22, 1980, aged 75 years.
  Willem was married in Wonseradeel on July 12, 1939, at the age of 33 to N.N..