ap Eynon and de Dene ancestry.

http://www.familysearch.org/Eng/search/AF/pedigree_view.asp?recid=7020289&familyid=...

as for validation... you have a few sources to look at including

http://www.archive.org/stream/bookofdenedeanea00dean/bookofdenedeanea00dean_djvu.txt

the entries in IGI such as :-

John ap Eignon or Baynham
--------------------------------------
Event(s):
Birth: About 1373 Dene, Gloucester, Gloucester, England

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Parents:
Father: Thomas Ap Eignon
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Marriages:
Spouse: Mrs. Elizabeth Ap Eignon or Baynham
--------------------------------------------------------------------------------
Messages:
Record submitted by a member of the LDS Church.
The record often shows the name of the individual and his or her
relationship to a descendant, shown as the heir, family representative, or relative.
The original records are not indexed, and you may have to look at the film
frame-by-frame to find the information you want. A family group record for this
couple may be in the Family Group Record Collection; Archive Section.
(See the Family History Library Catalog for the film number.) These records
are alphabetical by name of the father or husband.
-----------------------------------------------------------
Source Information:
Film Number: 471447

another to consider :-

Ralph Ap EYNON was born about 1306 in Newland, Gloucestershire, England.

He was married to Johanna De DENE on 18 Apr 1332 in Stapleford, Nottinghamshire, England. Children were: Thomas Ap EYNON.

Thomas Ap EYNON was born about 1332 in Newland, Gloucestershire, England. Parents: Ralph Ap EYNON and Johanna De DENE.

Children were: Thomas Ap EYNON.

Thomas Ap EYNON was born about 1354 in Mitcheldean, Gloucestershire, England. Parents: Thomas Ap EYNON.

Without wishing to offend anyone - at best you will get is a "feel" for the ancestry unless a documented family archive has been kept or a "peerage" style lineage - as in the Norman "de DENE" title is available.