Sije Boonstra, born in Harlingen on March 8, 1864, son of Sjouke Boonstra (longshoreman) and Hijlkje de Vries, bloatercurer, dock hand, docker and transport worker, died in Harlingen on September 15, 1923, aged 59 years.


Sije was married in Harlingen on June 4, 1888, at the age of 24 to
Grietje Tigchelaar (aged 24 years), born in Harlingen on May 27, 1864, daughter of Klaas Gerrits Tigchelaar (dock hand, workman and dock hand) and Grietje Dirks Sleeper van Arum (maid-of-all-work), maid servant, died in Harlingen on December 6, 1954, aged 90 years.

From this marriage: