I first found this information in a book entitled, "The Royal Descent of 500 Immigrants" by Gary Boyd Roberts, a distinguished genealogist from the New England Historic Genealogical Society. I also fond several other references to HUGH HARRY as a Royal descendant in such books as "Welsh Founders of Pennsylvania" & "Merion in the Welsh Tract" by Thomas Allen Glenn, and "The Lloyd Manuscripts" by Howard Williams Lloyd.
HUGH HARRY's lineage was researched mainly because he was an ancestor of US President Richard M. Nixon. Apparently several past US presidents have English royal roots in their family trees. And researching US presidential family trees seems to be a very popular pass time among genealogists. I believe both Barrack Obama's and John McCain's family trees are already posted online!
Anyway, I felt pretty confident that, with Gary Boyd Roberts as a source, this information was likely true, so I added the lengthly & complicated Welsh/English lineage to my Rootsweb online family tree huberfrazier2, and updated my "Famous Folks" page on my "Betty's Boneyard" webpage, see here http://freepages.genealogy.rootsweb.ancestry.com/bettysboneyard/index.html
Shortly afterward, I found a reference to the 2006 updated edition of "Royal Descent of 600 Immigrants" in which Gary Boyd Roberts states that he has dropped HUGH HARRY and his brother DANIEL HARRY from his list of immigrants with royal blood because there is not enough evidence to prove the connection.
This issue is HUGH & DANIEL's father, HARRY ap THOMAS OWEN b 1630s, who was also a Quaker, lived in Montgomeryshire Wales, but did not emigrate to America. HARRY's father had previously been lsited by Gary Boyd Roberts and others as THOMAS ap OWEN b 1598, wh was possibly sheriff of Montgomeryshire, and a very prominent man. But apparently there has never been any proof found that would establish the relationship, except for Welsh patronymics, which would indicate that HARRY's father was "THOMAS OWEN".
Several researchers still have not ruled out the possibility that THOMAS ap OWEN b 1598 was indeed the father of HARRY ap THOMAS OWEN. I'm sure some people are still working on this, although I have to admit personally that even spending a couple of hours with Welsh genealogy and it's complicated system of patromynics is a total head-splitter.
So--for the time being-- I am going to leave the entire HUGH HARRY royal lineage on my Rootsweb Worldconnect Online family tree called huberfrazier2. It would be a huge task to remove it.
I guess I will just have to be satisfied with being the descendant of a Welsh King: RHIRID FLADD, 'The Wolf', Lord of Penlynn, born about 1150, who is an ancestor of KATHERINE WILLIAMS b abt 1678, Quaker immigrant to Chester Co PA who married WILLIAM BROWN. Their daughter MARY BROWN married WILLIAM REYNOLDS Sr in Chester Co PA.