+--Daniel Dudley 
Mary Dudley 
|        +--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 
+--Martha Morrison  (1 APR 1792-FEB 1864)
   +--Mary Kimball