+--John Andrew Gerking  (27 Aug 1764-1815/1817)
      +--John Andrew Gerking  (14 Apr 1798-18 Aug 1879)
      |  |  +--William Rice 
      |  +--Rachael Rice  (26 Feb 1774-ABT 1855)
   +--William Gerkin  (ABT 1820-12 Jun 1863)
   |  +--Mary (Polly) Phillips  (Sep 1801-5 Jan 1855)
+--Alfred Gerkin  (2 Mar 1854-14 Mar 1931)
|  +--Lucinda E Roberts  (14 Jan 1824-8 Aug 1859)
Chester J Gerkin  (ABT Jan 1884-)
|  +--Capt Joseph Duncan  (12 May 1827-)
+--Nancy C Duncan  (ABT Oct 1865-1921)
   +--Margaret J Baker  (-29 Nov 1873)