I've been entering into my database the ancestry of Elizabeth Caton (1790-1862), second wife of George Stafford-Jerningham, 2nd Baron Stafford. As a result, I've been digging into the Digges family of Chilham Castle, Kent, and later of Bellfield Plantation, York County, Virginia.
Edward Digges of Bellfield Plantation (1621-1675) was Governor of Virginia 1655-1656. He was descended from Edward III through his father Sir Dudley Digges of Chilham Castle (1583-1639). Most sources identify Governor Digges's wife Elizabeth (d. 1691) as daughter of Francis Page of Bedfont, Middlesex (c.1593-1678):
http://www.genealogics.org/getperson.php?personID=I00259222&tree=LEO   
The only evidence for this seems to be the bequest in the will (dated 5 March 1687, proved 24 February 1692) of Col. John Page of Middle Plantation (1627-1692), son of Francis Page of Bedfont, "Itm. my Will is, that with as convenient speed as may be procured after my decease, eighteen funerall goold rings, one with another, of ye value of twenty shillings each, be given to those severall friends if living (Viz)...to my honored sister Eliz: Diggs":
http://archive.org/stream/genealogyofpagef00page#page/20/mode/2up  
The above will is transcribed in the book 'Genealogy of the Page Family in Virginia' (1893) by Richard Channing Moore Page. But the author is not certain if Elizabeth Digges was the blood sister of Col. John Page, or a sister-by-courtesy: "Eliz. Diggs was his sister by courtesy and mother of his daughter-in-law ... Eliz. Diggs (mother of Mary Diggs, wife of Francis?) was either sister by courtesy or else sister who married Diggs":
http://archive.org/stream/genealogyofpagef00page#page/26/mode/2up  
Capt. Francis Page of Middle Plantation (1657-1692) was the elder son and heir of Col. John Page. Francis's wife was Mary Digges (c.1658-1691), a daughter of Gov. Edward Digges and his wife Elizabeth. If the Governor's wife Elizabeth was the sister of Col. John Page, then Francis Page and his wife Mary Digges were first cousins. Capt. Francis Page in his will (dated 23 April 1692, proved 24 May 1692) makes "my well beloved brother in law Dudley Diggs" an executor, and leaves mourning rings to the same Dudley Digges and his wife, as well as his late wife's brother William Digges & his wife, and her sister and brother-in-law Anne Digges & William Cole. He doesn't refer to any of them as cousins:
http://archive.org/stream/genealogyofpagef00page#page/44/mode/2up  
Back in 2003 on the newsgroup, Fred Olen Ray posted
On Monday, June 23, 2003 5:53:33 PM UTC-7, Fred Olen Ray wrote:
> While delving into the parentage of Colonel John Page of Jamestowne I
> have seen one (or more) sources remarking that Page was a nephew of
> Sir Francis Wyatt (also stating that Henry Tyler was Wyatt's nephew as
> well). I've also seen reference to Francis and brother Hawte Wyatt
> having a sister, Isabelle Wyatt, who was Col. John Page's mother
> ("Americans of Gentle Birth, Vol. 1" Wyatt Genealogy).
[snip] 
> Has anyone ever heard of this before?
https://groups.google.com/d/msg/soc.genealogy.medieval/zOfMiZBvr5E/Zm8QpNn-vIAJ  
Paul Reed (much missed today on the newsgroup) replied that Ray should seek out 'Genealogy of the Page Family' (1893). The book makes absolutely no mention of Isabel Wyatt as wife or mother of Francis Page of Bedfont. It does quote from H. Barnham Burke, Somerset Herald at the College of Arms, who, at the request of Page descendants, searched in 1889 for the ancestry of Col. John Page of Middle Plantation. Burke discovered that Francis Page of Bedfont was John's father, thanks to the M.I. for Francis in St Mary Church, Bedfont. In the same church is a brass to Matthew Page of Bedfont (1594-1631) and his mother Isabel (d. 9 January 1629/30). Burke surmised that this Matthew was the elder brother of Francis Page, and that they were sons of one John Page of Bedfont (d. 1628, the last year he appears in record) and his wife Isabel.
http://archive.org/stream/genealogyofpagef00page#page/32/mode/2up  
Isabel Wyatt as the mother of Col. John Page persists on various online genealogies, one of the most detailed being the following:
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=68825033  
No doubt her name 'Isabel' originated from the brass in St. Mary Church, Bedfont for Isabel Page (d. 1629/30), and it is chronologically impossible for Isabel, the mother of Francis Page of Bedfont (b. about 1595), to have been the daughter of George Wyatt of Boxley Abbey (1553-1624, descended from Edward III) and his wife Jane Finch (c.1560-1644, descended from Edward I), who were not married until 1582. But could they have had a daughter (named Isabel or not) who married Francis Page of Bedfont, and who was the mother of Col. John Page of Middle Plantation (an ancestor of U.S. President John Tyler, by the way) and (possibly) mother of Elizabeth, wife of Gov. Edward Digges?
In both the 2004 (p. 778, sub Wyatt) and 2011 (p. 532, sub Wyatt) editions of Plantagenet Ancestry, George Wyatt & Jane Finch are assigned five sons and only one daughter, Eleanor Wyatt (d. 1623), wife of John, Lord Finch:
http://books.google.ca/books?id=kjme027UeagC&pg=RA2-PA532&dq=Eleanor+wyatt+Finch&hl=en&sa=X&ei=BF5XUoffDIObjAKW-oCIDw&ved=0CDMQ6AEwAQ#v=onepage&q=Eleanor%20wyatt%20Finch&f=false  
But per his bio in ODNB by historian David M. Loades, George Wyatt of Boxley Abbey "married Jane, the daughter of Sir Thomas Finch of Eastwell; they had five sons and four daughters".
Two of these additional daughters died unmarried, Katherine Wyatt (buried 10 May 1608 at All Saints Church, Boxley) and Anne Wyatt (buried 7 September 1611 at All Saints Church, Boxley). Their burial entries have been transcribed at the following website:
http://homepage.ntlworld.com/julian.wyatt1/allington.htm  
I've not yet uncovered the name & history of the fourth daughter. Prof. Loades also edited 'The Papers of George Wyatt', Royal Historical Society, Camden 4th Series, v (1968). Hopefully he identifies her in that work, which I will try and track down. It's very unlikely that the daughter was the wife of Francis Page of Bedfont, but it's necessary to determine who she was before we can completely put the myth to rest.
If anyone has further information on George Wyatt's daughters, or on Gov. Edward Digges and his wife Elizabeth, please share.
Thanks & Cheers,                       -----Brad