In August and September 2016, I posted a two-part article about the possible family of origin of Samuel Rankin (“Sam Sr.”) of Rowan, Mecklenburg and Lincoln counties, North Carolina whose wife was Eleanor (“Ellen”) Alexander. Having just reread the two posts, I found them tedious, overlong, and packed with trivial information that is unlikely to be of any interest whatsoever to anyone. I apparently have an unattractive propensity to beat dead horses from time to time. Moreover, new Y-DNA information on the issue has come to light which moots a substantial part of the argument in one of the posts.
I am going to delete both posts from this website as soon as I figure out how to do that. Here is their replacement, which just cuts to the chase re: old theories of Sam Sr.’s possible parents. It also provides a brief description of the Y-DNA evidence to date.
Rankin researchers have had two main theories about the identity of Sam Sr.’s father:
Theory #1 — Sam Sr.’s father was Joseph Rankin of White Clay Creek Hundred, New Castle County, Delaware (1704-1764). Let’s call him “Joseph of Delaware.” Two of Joseph’s proved sons who belonged to the same generation as Sam Jr. moved to Guilford County, NC. The primary source of Theory #1 is Rev. S. M. Rankin’s 1931 book, The Rankin and Wharton Families and Their Genealogy.
Theory #2 — Sam Sr.’s parents were Robert and Rebecca Rankin of Guilford County, NC. Call them “R&R.” Before migrating to North Carolina in the mid-1750s, Robert appeared on the 1753 tax list for West Nottingham Township, Chester County, PA.
Here’s the bottom line. First, there is no evidence whatsoever that I can find in the actual records of Delaware, Pennsylvania, North Carolina or any other colony to support either Theory #1 or Theory #2. Second, Y-DNA tests conclusively prove that both theories are dead wrong.
Here is a bit about the DNA evidence.
The Y-DNA evidence re: Theory #1
There is a Rankin DNA Project which provides (anonymously, if desired) Y-DNA results online. One member, Doug Rankin, has a solid paper genealogical trail proving he is descended from Joseph of Delaware. I located another proved descendant of Joseph of Delaware by conventional paper research – let’s call him “Mr. X.” Doug convinced Mr. X to test. Turns out that the two men are 37-marker matches with one mismatching marker, which genetic genealogists call a “37-marker match with a genetic distance of one” (or “GD=1”). That is a darn good match. Furthermore, the two men descend from different sons of Joseph of Delaware (John and William, both of Guilford Co., NC), so their close DNA match isn’t a function of a recent common ancestor: Joseph of Delaware is their common Rankin ancestor.
With two closely matching Y-DNA samples and two very solid paper trails, there is a high degree of confidence that Doug and Mr. X provide a good picture of the Y-DNA of descendants of Joseph of Delaware – as well as those who aren’t his descendants.
The Rankin DNA project has two other members (call them Mr. A and Mr. B) whose paper trails prove them to be descendants of Samuel and Eleanor Alexander Rankin. Neither of them is a match – not even remotely close – to Doug Rankin and Mr. X. Based on the tests from Mr. A, Mr. B, Mr. X. and Doug Rankin, the Y-DNA evidence proves conclusively that Sam Sr. cannot be a son of Joseph of Delaware. Note: this post is outdated. As of 16 April 2019, the Rankin Project has four members who descend from Samuel and Eleanor. The conclusion of this paragraph isn’t changed, however.
The Y-DNA Evidence re: Theory #2
The Rankin DNA Project now has two participants whose genealogical paper trail shows they are descended from R&R – Robert and Rebecca Rankin of Guilford. Note: as of 16 April 2019, there are three descendants of R&R in the Rankin DNA project. Again, the conclusion is not affected.
The first is Mr. R, whose paper trail conclusively proves that he is descended from R&R’s great-granddaughter Isabel Rankin (her maiden name) and her husband Robert Rankin. Robert’s parents are not conclusively proved. The obvious problem is that Mr. R inherited his Y-DNA from Robert, not Isabel. So the question is: who are Robert’s parents? I believe the circumstantial evidence overwhelmingly establishes that Isabel’s husband Robert was her second cousin, a proved son of George (1767 Guilford, NC -1851 McNairy, TN) and Nancy Gillespie Rankin. George, in turn, is a proved son of Robert Rankin of Guilford County, who is, in turn, a proved son of R&R. Consequently, Mr. R. is almost certainly (at least in my opinion) a descendant of R&R.
The second relevant Rankin DNA Project participant is Mr. M, whose paper trail leaves no doubt that he is descended from R&R through their great-grandson John D. Rankin, a son of George and Nancy Gillespie Rankin.
Mr. R and Mr. M are a 37-marker match with a GD = 2, a darn good match. For those of you who actually know something about the science of genealogical DNA, the two mismatched markers are at DYS 458 and CDY. My cousins Roger Alexander or Roberta Estes could undoubtedly appraise the quality of the match better than I can. I think it’s a good one.
Whatever. Neither Mr. R nor Mr. M – descendants of R&R – is a match with Mr. A or Mr. B, descendants of Sam Sr. and Eleanor Alexander Rankin. Their Y-DNA profiles are not even close. Sam Sr. is not, therefore, a son of Robert and Rebecca of Guilford.
Case closed. I’m guessing we are going to have to find a Rankin on the other side of the Atlantic to have a clue about Sam Sr.’s family of origin.
 Rev. S. M. Rankin, The Rankin and Wharton Families and Their Genealogy (Greensboro, NC: J. J. Stone & Co., printers and binders, 1931, reprint by Higginson Book Co., Salem, MA).