As every genealogical adept knows, the quality of the Mormon IGI database [International Genealogical Index] is truly amazing… particularly when we realize that the faith-based research efforts of the members of the so-called Church of Jesus Christ of Latter-Day Saints are motivated by beliefs that most of us look upon as totally ridiculous. Insofar as I see things in this way, should I therefore consider myself as a perfidiously dishonest double-dealer when using the Mormons' data to pursue my own kind of research?
No, not at all. If each citizen, in his daily preoccupations and activities, were to make a point of refraining from exploiting resources that had been created or obtained in ways that didn't necessarily conform to his personal convictions, then he would be condemned to sitting passively on his backside and waiting for events in the world to metamorphose magically into his ideal vision of reality.
There has always, however, been a curious weakness in the style of presentation of IGI entries. [I haven't checked whether this weakness has been corrected in the latest version of their search tool.]
The problem—unless I'm dumb—is that it doesn't seem to be possible to obtain a list of all entries sorted by date. This was annoying in that I wanted to know at what dates we start to find church records for individuals named Skeffington, Skevington, Skivington, etc. So, I decided to play around manually with the various Mormon IGI entries, using the excellent BBEdit text editor, with the intention of processing and examining all the available data... which has taken much time. My findings are summarized in the following chart:
After primitive Latin-inspired versions of the name—such as Sciftitone (Domesday Book of 1086) and Sceftinton (Leicestershire Survey of 1125 and Leicestershire Pipe Rolls of 1165 and 1192)—the earliest "modern" spelling was undoubtedly Skeffington, which appears in a Mormon IGI record dated 1315. The spelling with "ev" instead of "eff" appears a century and a half later, in 1478, and the "e" vowel is replaced by an "i" for the first time in 1563. The respective volumes of the various spellings present in the Mormon IGI are no doubt significant in a rough way. As you can see, there's a large package of Skevington entries, particularly for the 17th and 18th centuries, whereas the volume of Skivington spellings remains relatively low.
At a concrete level, what these deductions mean is that I might expect to find a Y-chromosome match, one of these days, with a fellow whose surname is Skevington. As for a match with a Skeffington, I've already more-or-less ruled out that likelihood, because I'm convinced that all the ancient male lines of that name ran aground (if I can be allowed to express myself in that fuzzy manner). In any case, for the moment, I would appear to be the only male individual with a Skeffington-based surname who has had his DNA tested.