+--Robert Morrison 
      +--William Morrison  (30 NOV 1726-28 FEB 1778)
      |  +-- Elizabeth 
   +--David Morrison  (14 OCT 1756-5 JAN 1826)
   |  +--Jane Rogers  (-AFT 1794)
+--William Morrison  (BEF 1790-)
|  +--Margaret McGrath  (5 JUL 1766-30 AUG 1843)
William Morrison 
+--Rachel Lewis