Claas married Lena Claasdr van der Weide, daughter of Claas Arends van der Weide and Neeltje Hendriks de Heer, on 30 May 1785 in Groot-Ammers.167 (Lena Claasdr van der Weide was christened on 23 May 1760 in Langerak 167 and died on 25 November 1846 in Langerak 167.)