+--Samuel Morison  (1671-29 SEP 1757)
   |  +--  
+--Samuel Morrison  (13 Mar 1727-15 Mar 1775)
|  +--Margaret Henry  (1685-30 APR 1774)
David Morrison  (27 AUG 1763-8 DEC 1832)
|  +--Randal Alexander 
|  |  +--  
+--Isabel Alexander  (16 FEB 1721/22-AFT 1776)
   +-- Janet