I came here to Geni to cross-check a conflict on Wiki. This Nancy (Vann) Cook is attached to Thomas Vann and Martha Buchanan on Wiki and I have a DNA match on Ancestry with one of her descendants claiming this connection; however, the Nancy (Vann) Williams also on Wiki as the daughter of Thomas Vann and Martha Buchanan is the only one of the two Nancys showing any documentation as their daughter and she's the one who is listed as Nancy D. Vann:
https://www.wikitree.com/wiki/Vann-706
This Nancy (Vann) Cook is listed on Wiki as her half-sister, as are some of the other Vann siblings, and yet they're both connected to the same parents.
https://www.wikitree.com/wiki/Vann-672
They don't appear to be the same Nancy who maybe married twice, because their dates are different. This is the biography on Wiki for Nancy D. (Vann) Williams:
Biography
Nancy was born about 1814. She was the daughter of Thomas Vann and Martha Buchanan. She passed away bef. 1850.
Nancy D. Vann, It is not known where or when Nancy D. Vann was born but she was deceased before 1850. On 13 April 1837, she married George W. Williams. There is a deed from Marthy and Thomas Vann to G. W. Williams, dated 1844, to land in Section 11, Township 6, 2-East, Vienna, Madison, Alabama.
In the Will of Thomas Vann II, it is stated: "I also give and bequeath to Nancy Williamses' Heirs of her body an equal portion of the money. At the settlement of this Estate, the five heirs of Nancy D. Vann Williams received a 1/9th portion which was divided into 5 equal parts.
19 March 1860; Probate Court, Jackson County, Alabama. George Williams was appointed Guardian of the following (his children); Samuel G. Williams, minor; Henrietta T. Williams, Margaret J. Williams, Martha A. Williams, and Mary C. Williams. Nancy Vann Williams, the mother of these children, was the deceased wife of George Williams and the daughter of Thomas Vann II.
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As you can see, she's documented in the will of her father Thomas Vann II. There is no such documentation for Nancy (Vann) Cook in his will.
I'm sure Nancy (Vann) Cook is somehow related to these Vanns but doesn't seem to be the daughter of Thomas Vann II and Martha Buchanan. I surely would love to find who her actual parents were since I have a DNA match to a descendant of hers who has this same connection in their tree, maybe copied from here on Geni.
Thanks in advance for any additional information on Nancy (Vann) Cook, but I believe she should be disconnected from Thomas Vann II and Martha Buchanan as her parents, given the evidence that she seems to have been confused with their daughter Nancy (Vann) Williams who is documented in the will.