+--Hendrick van der Hammen  (21 Dec 1806-DECEASED)
   +--Jan Hendrik van der Hammen  (23 Jul 1849-30 Nov 1898)
   |  +--Lammertje Kool  (26 Mar 1807-DECEASED)
+--Lambertus Johannes van der Hammen  (2 Oct 1873-DECEASED)
|  +--Margaretha Schoep  (Apr 1852-4 Aug 1914)
Johanna Wilhelmina van der Hammen  (Oct 1909-2 Jul 1979)
+--Johanna Wilhelmina Middag  (30 Nov 1872-8 Dec 1926)