I think I can clear up some of the story of "William W. Durrence"(the spelling they used in Georgia).
First, Welcom Durrence was not a daughter of Samuel. He is the William W. who settled in Tattnall County, Georgia. Welcom is the "W" in William W.
Elizabeth Williams, the wife of W. W. was not the daughter of Seth Williams. Seth was a younger brother of Elizabeth. Their father was William Williams, a DAR patroit of North Carolina He and some other of his sons also came to Georgia, settling in the Screven, Bulloch, and Tattnall area.
One of the sons of W.W. Durrence was also a W.W. Durence. the W. W. stood for William Williams Durrence (m. Cynthia Tippins, daughter of Phillip), most likely named for Elizabeth's father, William Williams. William Williams Durrence's daughter, Sarah Matilda Durrence was my GGGrandmother.
As an aside, three of Welcom's children married children of Hardy DeLoach(R.S.), and three others married children of Phillip Tippins(R.S.). This might have genealogists of the three families confused for generations to come.
I am descended from Seth Williams(R.S.), and Welcom(R.S.) & Elizabeth Williams Durrence.