Mary Wolverston, Lady Killigrew (formerly Knyvett; born before 1525 – died after 1587), was a gentlewoman from Suffolk, married into an ancient Cornish family, who was accused of piracy during the reign of Queen Elizabeth I (1558-1603).
[4] She was the wife of Sir John IV Killigrew of Arwenack (d. 1584),[5] near Penryn in Cornwall, 2nd Governor[6] of nearby Pendennis Castle, built on the family's estate.
[8] Historian Neville Williams described Mary (whom he erroneously called "Elizabeth") as a "tough and unprincipled businesswoman" who managed Arwenack House and oversaw the burial of treasure in her garden.
[citation needed] Mary Wolverston, Lady Killigrew, died on an unknown date in the parish of St Budock, Cornwall, in which was situated Arwenack.
By her husband Mary had the following progeny: Several sources have confused this lady with Sir John IV Killigrew's mother Elizabeth Trewennard/Trewinnard and even with his granddaughter-in-law Jane Fermor.