+--David J. CLARKSON  (ABT 1794-BEF NOV 1837)
Elizabeth CLARKSON  (ABT 1827-BEF 1876)
|     +--John JACOBS, SR. 
|  +--John JACOBS, JR.  (BET 1770 AND 1780-5 FEB 1838)
|  |  +--Sarah CRAWFORD 
+--Elizabeth B. JACOBS  (ABT 1807-BEF 1857)
   +--Lucy HILL  (ABT 1780-BEF 1841)