John Alexander Duff - Pedigree | FamilyCentral
 4 Sep 1817 - 1880
 3 Jan 1768 -
 1 Feb 1773 -
 25 Jul 1744 - 21 Dec 1819
 1746 - 29 Dec 1823
Family Group
 Abt 1720 - 17 May 1796
 1722 - Aft 1796
 Abt 1700 - 1780
Family Group
Letitia Jane Swingle
 md. 23 Sep 1837
Family Group
  Children
    1.
Michael Duff
    2.
Florence Duff
    3.
Letitia Duff