So, well. Ok.
The son we have here on Geni for this David ap Rhys, who is called David ap Reese, Jr., is, except for the Jr. part, pretty well documented and I have no argument with him.
But the sources given for him do NOT mention parents.
And the line of parents above here is not believable.
But! This comes from a source! A Book!
The source that this line comes from is Genealogy of the Reese Family in Wales and America: From Their Arrival in America to the Present Time." It is by Miss Mary E. Reese. 1903.
https://archive.org/stream/genealogyreesef00reesgoog/genealogyreese...
Ok.
I will now explain why I fell off my chair whilst trying to read this tome.
If the author had confined herself to the Reese family in America I would be leaving her alone, (Though frankly, if I were working on the later Reese lines I would want to check her work.)
But the Reese Family in Wales part is Not OK.
Skipping all the poetic romanticism at the beginning of the book and going straight to the 3rd chapter, which gives us the line as it has been copied into Geni, let us observe the Reese Family in Wales.
We are told that the Reese family was at the siege of Londonderry. I doubt the whole family was there, but Sir David ap Rhys might well have been; the siege of Derry was 1688-1699, so he could have been there.
But. We are the told that his ancestor Sir David Reese was a lineal descendant of Lord Rhys, and married Gwellion, the daughter of Griffith Koran, King of Wales. So if we go looking for Gwenllian verch Gruffudd ap Cynan -- which I gather is what this must mean -- we get Gwenllian verch Gruffydd -- and she is indeed the daughter of one of the kings of Wales, but she lived in the 12th century and was married to,Gruffudd ap Rhys, and David ap Rhys just isn't in it. And also lived hundreds of years later.
And their son Thomas married Mawd de Brewes, who was the great great grand daughter of Beli, the Emperor of Britain. I think she means Maud de Braose, Baroness Mortimer, who was not married to Thomas Reese, or rather Thomas ap Dafydd. Also she is not the great granddaughter of Beli Mawr "The Great", {Fictitious, Mabinogion}
And HIS son, David ap Rees (why is he not Dafydd ap Thomas) was married to Gladys, the daughter of Redwallon, the king of Powys! She means Gwladys verch Rhiwallon, Queen of Deheubarth. She wasn't married to David anybody.
So, in short, the immediate ancestors of the David Reese who went to America have been cobbled together from people who,didn't know each other, and existed centuries apart. And it makes no sense. A David Reese who lived in the 18th century cannot be the great grandson of rulers of kingdoms that had long been gone by 1400.
My favorite part is the Kingdom of South Wales, which in this fairy tale existed in the 16th century. I tell you what, I do believe the Tudors would have noticed if that sort of alternate kingdom had been going on.
Anyway.
If you like you can follow the link and read lots more entertaining nonsense about the romantic and poetic ancient Welsh, who,apparently were so romantic and poetic that they obeyed not the laws of time and space, but verily, didst skip around the centuries, unfettered by actual history.
My recommendation: the entire line above the guy who went to America needs to be cut.
Some of the people actually existed, but not as they appear here.
I think it should be cut and labeled fictional, and the immigrant profile given a curators note explaining the situation.
And I am so sorry. There was a source. There was a published source. It looked good. Alas, it told lies.