Your gg-mother was my fathers older sister His name was Buster F. DuVal. Frank's (b. 1864)Father was Dr. William DuVal(b. 1829)of Waldron Ark., Wife Elizabeth Thompson DuVal of Tenn. Dr. William is a son of William DuVall(b. approx. 1790) of Ft. Smith Ark. His Father was Benjamin, Wife Jemina Taylor Duval Frederick, Maryland. From there is you get the book Mareen Duvall of Middle Plantation by Harry Wright Newman you will get to the orignial Frenchman.
I remember when your gg-mother died and some stories of her from my dad. How well she took care of their mom. He seemed to think she married "well" to a Quackenbush. E-mail me I have lots more data.