Question: When did Mary Villiers, Countess Of Buckingham's husband die?
Sentence (from "Mary Villiers, Countess of Buckingham"): Mary Villiers, Countess of Buckingham (née Beaumont; c. 1570 – 19 April 1632) is perhaps best known as the mother of the royal favourite Sir George Villiers, 1st Duke of Buckingham.
Relevant evidence: Yes