+--Thomas Davidson 
+--David A. Davidson  (6 MAR 1830-1 NOV 1873)
|  |           +--John Morison  (1628-16 FEB 1736)
|  |        +--John Morison  (1678-14 JUN 1776)
|  |        |  +--Wife One 
|  |     +--John Morison  (20 SEP 1725-27 DEC 1816)
|  |     |  +--Margaret Wallace  (1687-18 APR 1769)
|  |  +--Daniel Morison  (24 NOV 1760-26 NOV 1832)
|  |  |  +--Martha Anderson  (1732-31 MAR 1811)
|  +--Margaret Morison  (15 OCT 1795-)
|     +--Rachel McLellan  (1766-21 NOV 1843)
Margaret Ann Davidson  (7 JAN 1859-DEC 1875)
|  +--Joseph Mahon 
+--Isabella Mahon 
   +--Hannah Morrison