Klaas married Jantje “Jennie” Oosterhuis on 7 May 1870 in Slochteren, Groningen, Netherlands. Jantje (daughter of Gerrit Hindriks Oosterhuis and Geessien Eppes Kreemer) was born on 4 April 1845 in Garmerwolde, Ten Boer, Groningen, Netherlands. [Family Group Sheet] [Family Chart]

1. Garret Hoogacker was born on 14 February 1874 in Ten Boer, Groningen, Netherlands; died on 31 August 1937 in Comstock twp., Kalamazoo Co., Michigan, USA.
2. Nellie Hoogacker was born about 1879 in Netherlands.
3. Reina Hoogacker was born on 28 October 1883 in Ulrum, Groningen, Netherlands.
4. Wolter “Walter” Hoogacker was born on 26 January 1885 in Ulrum, Groningen, Holland.
5. Barrelt “Barney” Claas Hoogakker was born on 22 December 1888 in Groningen, Groningen, Netherlands; died on 29 February 1980 in Kalamazoo, Kalamazoo Co., Michigan, USA.
6. Jaapje Hoogacker was born on 22 December 1889 in Groningen, Groningen, Netherlands; died on 9 April 1889 in Groningen, Groningen, Holland.

Klaas married Rienje Klaassens Schild. Rienje was born in 1805. [Family Group Sheet] [Family Chart]