I'm interested in genealogy too, but never thought of combining my love for music with it. What songs do you do, and what era costuming?

I discovered recently that my grandfather used to sing "Preacher & the Bear" - probably c. 1920, and that he also sang a phrase or two of "The Dying Soldier of Buena Vista" a song about the 1848 Mexican-American war, in which his father served as a Tennessee Volunteer.   

On my dad's side, he had an uncle who lost a leg in a mining accident and was a barber, a magician in a traveling tent show, and a fiddler (my dad also rode bucking horses in the same show). One of the tunes this great uncle apparently played on the fiddle, and sang, was a version of the "Farmer's Cursed Wife". My elderly aunt,in remembering this, would chuckle at the line "sez he old woman, you're a hell of a load!"