Royal and Noble Ancestors

According to the Dictionary of National Biography (British), Sir George Gregory Fienes had no children and his estates were taken over by his sister [Margaret]. Therefore the Mary listed on your page has no connection to royalty.
Yours,
Bruce Carpenter (descendant of Thomas Bliss)
"carpenter"

But a more recent email points to Mary as the bastard daughter of Sir George Gregory Fienes.

There is a website called simply Anne Sackville (B. Dacre of the South) that has information on Mary Fienes.

The mother of Mary is not mentioned, but it is mentioned in this history that Anne Sackville would have nothing to do with Mary because she was a bastard daughter of her husband, George Gregory Fienes. The site is at http://www.tudorplace.com.ar/Bios/AnneSackville.htm.

The person who did this research is Robin Kullick of the Bristol Renassaince Faire. In the article it mentions that Anne Sackville was from a very powerful and wealthy family, her father owning Salisbury Court - her father being Sir Richard Sackville a relation of the Boleyns. Her grandfather on her mother's side was the Lord Mayor of London - so I would imagine it would have been very difficult for a bastard daughter of a man who had so much less than his wife's family. It does mention that she married someone named Wheatley in the article.