+--John Andrew Gerking  (27 Aug 1764-1815/1817)
         +--David Peter Gerking  (25 Feb 1799/1800-7 Apr 1860)
         |  |  +--William Rice 
         |  +--Rachael Rice  (26 Feb 1774-ABT 1855)
      +--John Walker Gerking  (21 Jul 1838-12 Feb 1915)
      |  |  +--John Maple  (1768-ABT Aug 1820)
      |  +--Sarah Maple  (1 Mar 1810-21 Jul 1893)
      |     +--Sarah Haws-Hawes 
   +--Henry Wilfred Gerking  (5 Oct 1897-3 Feb 1968)
   |  |  +--Chester Stillman Johnson  (24 Sep 1822-20 Jun 1879)
   |  +--Ida May Johnson  (17 Aug 1860-14 Nov 1933)
   |     +--Sarah Ann Olds  (24 Jan 1834-9 Apr 1901)
+--Robert Loren Gerking 
|  |  +--Lon Davis 
|  +--Kathryn Doris Davis  (8 Feb 1908-29 Aug 1982)
|     +--ellen Sundell 
R Mark Gerking 
|  +--Donald Dugan 
+--Mary Ellen Dugan 
   +--Helen Keitges