Have you seen the pages from Huguenot Magazine, issue no. 22, pgs.98 - 103?They deal with descendants of Benjamin Brashear and it has one of his daughters, Susannah as being md. to Mareen Duvall and has in ( See H.W. Newman's Mareen Duvall of Middle Plantation, pgs. 26 & 7)Then another source, still from Huguenot Society Index, 1959 - 1961, vol. 19, pg. 135 has a section on just the origin of surnames.It has Duvall - Duval. It says Mareen's son, Mareen Duvall md. Elizabeth Jacob, and their Mareen md. Ruth Howard.I have the 1st mentioned document typed up and can do this last part and send to you if you need it. Also have a listing of births and marriages from Prince George's Co., MD that I can share that has Duvalls
Hope to hear from you.
Lynne in MS P.S.Think this Duvall line will connect up eventually with my Susannah Duvall who md. Edward Mobley.