Duff married Nancy Jane Muncy on 18 Dec 1870 in Claiborne County, Tennessee, USA. Nancy (daughter of John Earl Muncy and Sabra Walker) was born on 30 Aug 1852 in Lee County, Virginia, USA; died on 1 May 1930 in Claiborne County, Tennessee, USA; was buried in May 1930 in New Tazewell, Claiborne County, Tennessee, USA. [Group Sheet] [Family Chart]