+--Archibald Clendennin 
   +--William Clendennin 
+--Robert Clendennin  (1743-30 NOV 1818)
|  |  +--John Morison  (1628-16 FEB 1736)
|  +--Hannah Morison  (1716-7 JAN 1802)
|     +--Jeanette Steele 
John H. Clendennin  (20 NOV 1773-10 OCT 1837)
+--Elizabeth Humphrey  (1752-11 DEC 1806)