Hey Jonathan, thanks for replying.
Neither my group's yDNA match nor my group have a paper trail on our male lines back to William the Conqueror. I'm not sure anyone alive today has such a thing.
My research involves agnatic lines of William the Conqueror, that is, it involves male lines that share a common patrilineal origin with the male line of William the Conqueror.
This is similar to the attempt undertaken by Michael Maglio, but is much more precise as the family of a yDNA donor of a very well documented male line has been generous enough to allow his information and DNA to be used in this search.
My research is largely unique and will not be found elsewhere, online or in print.
My immediate group can be tied, via autosomal DNA analysis, to the Smiths of Blackmore in Essex. These Smiths, according to many, descend from a Carrington line that is suggested by many to be descended from a Marquis of Carentan, Normandy, France. This person was descended from the same male line as Richard the Fearless.
John Horace Round attempted to do away with any remaining belief that this Carrington alias Smith story held any possibility of being legitimate, but I have been able to show where his research is lacking in quality control. I do agree with him on many points, but his reliance on heraldic elements in his arguments mostly invalidates them.
My group's yDNA match descends from a Somerset Hamilton Butler, 1st Earl of Carrick and a patrilineal descendant of Hervey Walteri, a patrilineal descendant of Richard the Fearless.
So not sure where we're seeing that I've stated I'm descended from William the Conqueror on my male line. None of my research will ever state that. If you do find reference to my research that includes such a statement, it is errant and I request that you let me know where you find that statement so I can be sure it gets corrected.
Thanks for the interest! I'd really like to get my research added to the WikiTree pages where appropriate. I believe it will help many researchers.