+--Alexander ALLISON 
Ernest ALLISON 
|     +--Archibald THOMSON  (1806-)
|  +--Robert THOMSON  (1840-)
|  |  +--Elizabaeth GETTY  (1812-)
+--Matilda THOMSON  (1879-)
   |  +--John COCHRANE 
   +--Jane COCHRAN  (1843-)
      |  +--Thomas MCCLOY 
      +--Letitia FULLERTON 
         +--Elisabeth THOMSON  (1791-)