+--Johan Hermann Graman  (1733-25 Jul 1806)
+--Johan Bernard Graman  (19 Dec 1771-24 Aug 1804)
|  +--Luzia Adelheid Bange  (24 Nov 1737-14 Aug 1789)
Hermann Heinrich Gramann  (5 Jul 1803-27 Apr 1880)
|  +--Johan Hermann Kolkers 
+--Catharina Elisabeth Kolkers  (3 Sep 1769-23 Jul 1826)
   +--Margaretha Catharina Elisabeth Dieker