William FitzWilliam (Lord Deputy) William FitzWilliam (Lord Deputy) Sir William FitzWilliam (1526–1599) was an English Lord Justice of Ireland and afterwards Lord Deputy of Ireland. In 1587, as Governor of Fotheringhay Castle, he supervised the execution of the death sentence on Mary, Queen of Scots. He was the Member of Parliament for Peterborough and represented County Carlow in the Irish House of Commons. He lived at Gainspark, Essex, and Milton Hall. FitzWilliam was born at Milton Hall, Northamptonshire, the eldest son of Sir William (d. 1576) and grandson of William Fitzwilliam, Sheriff of London, who had been treasurer and chamberlain to Cardinal Wolsey and
Mary Queen of Scots (2013 film) well as the Italian musician David Rizzio. Upon reaching adulthood Mary is married to the Dauphin, Francis, who becomes King of France when his father dies. News arrives that Queen Mary I of England has died and her sister, Elizabeth, has become Queen despite her official status as a bastard. Mary is aware of her own legitimate claim to the English throne; although she writes to Elizabeth promising not to challenge her, she insists on using the English coat of arms and the title "Queen of France, Scotland and England". After Francis's early death, Mary returns to Scotland with her