Klaas married IJtje Gerbens Koopmans on 24 Jul 1810 in Ferwerd, Ferwerderadeel, FR, NLD. IJtje (daughter of Gerben Gelts Koopmans and Renske Annes Dijkstra) was born about 1789; died on 28 Aug 1829 in Ferwerderadeel, FR, NLD. [Group Sheet] [Family Chart]

Klaas married Geeske Piers Prins on 31 Mar 1831 in Ferwerderadeel, FR, NLD. Geeske (daughter of Pier Doekes Prins and Geeltje Jogchums) was born about 1789 in Birdaard, Dantumadeel, FR, NLD; died on 10 Jan 1866 in Ferwerderadeel, FR, NLD. [Group Sheet] [Family Chart]