+--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 
+--Ralph Greenleaf Gerking  (9 Jan 1891-5 Aug 1965)
|  |  +--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)
John Lewis Gerking  (29 Jan 1926-Sep 1984)
|  +--Norman Lewis Olson  (12 Aug 1865-20 Jul 1928)
+--Martha Lorena Olson  (9 Jul 1900-18 Apr 1968)
   +--Anna G Molvig  (5 Sep 1871-3 Jan 1929)