+———Jannus Langman (21 Aug 1826 Steenwyk, Oferysel, Netherlands – 14 Aug 1877)      |  +———Hartgerd Langman (25 Mar 1865 Buurmalsen, Gelderland, Netherlands – 12 Apr 1942)  |   |      |   +———Antien Meenderink (9 Mar 1830 Steenwyk, Oferysel, Netherlands – 17 Nov 1893)  |      Renske Langman (20 Oct 1899 Steenwijk, Overijssel, Netherlands – )  |      +———Aaltje Koelma (25 Oct 1863 Weststellingwerf, Friesland, Netherlands – 5 Aug 1930)