Here is a quote from the gen-medieval forum at http://archiver.rootsweb.ancestry.com/th/read/GEN-MEDIEVAL/2013-10/1381458934
Isabel Wyatt as the mother of Col. John Page persists on various online genealogies, one of the most detailed being the following:
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:
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:
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.