Karl M Thacker
I discovered a year ago that my YDNA simply did not match to any known Thacker record. Instead, I match closely to Swift, as well as a couple of Sanders and Knuckles/Nuckolls. The Swift are descendants of the Flower Swift family.
Well, after a whole lot of looking for any Who, When and Where that would explain the situation with my not matching to other descendants of the Louisa Co., VA & Vinton Co., Ohio, Thackers, it is now 99% set in stone that my own grandfather, Wilmer Charles Thacker, b 1910, Baring, Knox County, Missouri, was not fathered by a Thacker. Comparisons on GEDMatch and Ancestry DNA with the children of my paternal uncle, as well as with children of Wilmer's own sister, it is clear that myself and the children of my uncle fall on one side, and that the son of my grandfather's sister falls on another.
At this point in time I have a Swift living, literally, down the street from my great-grandparents at the time of my grandfather's birth. There may extenuating circumstances, but I guess I'll see.
My lineage for the time is:
Wilmer C Thacker Sr, b 1910, Baring, Missouri
James M Thacker, b 1936, Des Moines, Iowa
Karl Thacker, b 1968, Des Moines, Iowa