+--Robert Rittenhouse  (9 Mar 1929-1 Dec 1998)
Robert Eugene Rittenhouse 
|              +--John Andrew Gerking  (27 Aug 1764-1815/1817)
|           +--Jonathan Rice Gerking  (17 Dec 1812-12 Jul 1882)
|           |  |  +--William Rice 
|           |  +--Rachael Rice  (26 Feb 1774-ABT 1855)
|        +--Jonathan Napoleon Bonaparte Gerking  (28 Jan 1846-8 May 1928)
|        |  |  +--Solomon Myers  (22 Jan 1786-5 May 1861)
|        |  +--Nancy Ann Myers  (11 Apr 1818-9 Jun 1910)
|        |     |  +--David Stewart 
|        |     +--Mary (Polly) Stewart  (8 Nov 1786-12 Jun 1865)
|        |        +--Henrietta George 
|     +--Ernest Dean Gerking  (18 Jul 1881-11 Nov 1945)
|     |  |     +--Gideon Pottorff 
|     |  |  +--George Rutter Pottorff  (27 Jun 1825-8 Oct 1914)
|     |  |  |  +--Susannah Allhands 
|     |  +--Lucy Pottorff  (9 Oct 1848-3 Mar 1946)
|     |     |  +-- Russell 
|     |     +--Hannah Russell  (19 Sep 1828-10 Jun 1919)
|     |        +--Elizabeth  
|  +--Ardis Dean Gerking  (7 Nov 1907-30 Jan 1976)
|  |  |     +--John W Tharp 
|  |  |  +--Francis Tharp  (30 Jan 1850-17 Jun 1925)
|  |  |  |  +--Perline Daniels 
|  |  +--Fannie Elora Tharp  (1 Aug 1886-8 Jan 1972)
|  |     +--Glaphina Garletts  (1860-)
+--Daurice Ahda Gerking 
   |  +--Herbert Underhill 
   +--Ahda A (Marie) Underhill  (26 Jan 1909-22 May 1987)
      +--Phyllis Barton Norris