Klaas Tigchelaar, born in Harlingen on October 30, 1899, son of Klaas Tigchelaar (docker) and Antje Rienstra (maid servant), 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.