John and Martha (Walker) DUFF Looking for info on the Duff family not sure exactly where they lived. My grandfather Andrew setled in Littleon NH across the river around the 1890's. They came down from Megantic County Quebec, I think about 1880. John Duff and Martha(Walker) Duff and 10 children. There is a plot in the Lyndon Center cemetery. John Duff show email address