+--Robert Morrison  (ABT 1700-1764)
      +--William Morrison  (BET 1720 AND 1727-1758)
      |  +--Unknown    (Abt. 1700-Bef. 1750)
   +--Robert Montgomery Morrison  (January 26, 1751-6 FEB 1808)
   |  |           +--John Montgomery  (1640-1689)
   |  |        +--Robert Montgomery  (1660-1689)
   |  |        |  +--Isabella Shaw 
   |  |     +--William Montgomery  (1675-MAY 1733)
   |  |     |  |  +--High McCullom 
   |  |     |  +--Mary McCullom  (1665-3 Dec 1692)
   |  |  +--John Montgomery  (1703-4 OCT 1743)
   |  |  |  +--Mary Akin  (1682-1756)
   |  +--Sarah Montgomery  (1728-3 OCT 1817)
   |     |  +--James HARPER  (1676-1775)
   |     +--Sarah Harper  (1705-1749)
   |        +--Jannett LEWIS  (26 Feb 1657-)
+--Samuel Morison  (26 MAY 1788-21 AUG 1867)
|  +--Dorcas Staples  (9 Dec 1703-26 JAN 1805)
Russell Streeter Morison  (14 MAR 1822-UNKNOWN)
+--Betsey Benjamin  (29 DEC 1790-UNKNOWN)