+--John Killough\Killogh  (CA. 1630-1689)
                  +--John Killough  (1657-CA. 1715)
                  |  +--Mary Hyde 
               +--Robert Killough  (1681-1737)
               |  +--Anne MacNeil 
            +--David Killough, I  (CA. 1712-1761)
            |  +--Margaret Finley 
         +--David Killough  (CA. 1742-APR 1785)
         |  +--Mary ______ 
      +--James Killough  (1765-4 JAN 1850)
      |  +--Margaret Stinson 
   +--John Killough  (CA. 1803-BEF. OCT 1848)
   |  |  +--John McCreary 
   |  +--Agnes "Nancy" McCreary  (12 JUN 1770-29 AUG 1847)
   |     +--Rebecca Clark 
+--William Madison Killough  (25 JUN 1841-6 OCT 1897)
|  +--Delila Stephenson  (1805-28 JAN 1873)
Ona Clementine Killough  (3 NOV 1893-)
+--Calidona Clementine Helms  (28 SEP 1861-4 DEC 1947)