Nancy Elizabeth Puckett (Allen) - who are her parents?

Let me start with the 1st 2 Elizabeth Allen ladies who married Thornton men:

Elizabeth Allen, d/o William Allen DAR #A001871 was married to Reuben Thornton & moved from VA to GA.

William Allen

Elizabeth Thornton

Reuben Thornton

Elizabeth Allen, d/o Rev Nathaniel Allen DAR #A001763 was married to Jeremiah Thornton & also moved from VA to GA.

Rev. Nathaniel Allen

https://www.findagrave.com/memorial/34691708/jeremiah-thornton

https://www.findagrave.com/memorial/34691692/elizabeth-thornton

Now we have a Nancy Elizabeth Allen who is currently located on Rev. Nathaniel Allen's tree & is married to Drury Puckett, Jr from KY & is an MP.

Nancy Elizabeth Puckett

Her descendants are the only people that I have found that claim that her maiden name was Allen & perhaps they are correct. There is a family bible that they make reference to & all of that documentation is on her husband's profile (Drury Puckett, Jr.).

I really need to put the correct Elizabeth in her correct family group; however, until the correct parents of Elizabeth #3 are known, I do not want to lose her either. What bothers me the most here is that she is an MP with no sourcing.

Does anyone happen to know of a source for this Nancy Elizabeth Allen #3 as to her correct parentage?