Albert Dirks Kool, born in Wijnaldum on April 17, 1842, son of Dirk Rommerts Kool and Liesbert Alberts Alberda, worker, died before February 14, 1916, aged at most 73 years.

Albert was married to
Lijsbeth Aukes Dijkstra, born in Pietersbierum on March 9, 1843, daughter of Auke Harmens Dijkstra (bargeman) and Ytje Ouwrens Post, died in Harlingen on February 12, 1916, aged 72 years.

• 1 : Rinske Kool, born in Harlingen on April 14, 1884, died there on January 13, 1945, aged 60 years.
  Rinske was married in Harlingen on June 14, 1909, at the age of 25 (1) to Douwe Tigchelaar (aged 36 years), born in Harlingen on April 7, 1873, son of Klaas Gerrits Tigchelaar (dock hand, workman and dock hand) and Grietje Dirks Sleeper van Arum (maid-of-all-work), casual labourer, workman and workman cleansing department, died in Harlingen on March 22, 1920, aged 46 years.
  Rinske was married (2) to Broersma.
  

• 2 : Durk Kool, born in Harlingen on October 21, 1890.