The Wikipedia article for “Margaret and mary Shelton” has this portrait and suggests they may be the same person (without benefit of quantum physics). She may have been six-months lover to Henry VIII in 1535 (while he was married to Anne Boleyn to whom Lady Mary was a Lady-in Waiting). She was married to Sir Anthony Heveningham.
From Wikimedia. Originally found on pinterest.com/crownedheads/1500-gabled-head-dress/.