+--Archibald Clendennin 
   +--William Clendennin 
+--Robert Clendennin  (1743-30 NOV 1818)
|  |  +--John Morison  (1628-16 FEB 1736)
|  +--Hannah Morison  (1716-7 JAN 1802)
|     +--Jeanette Steele 
William Clendennin  (6 JUL 1775-26 JAN 1851)
+--Elizabeth Humphrey  (1752-11 DEC 1806)