English Aristocracy. Born the son of John Dudley, 1st Duke of Northumberland and Jane Guildford. He served with his father in repressing the Norfolk rebellion of 1549, and was knighted as a result. When Edward VI died young, he joined with his father and brothers in a plan to supplant Mary and place Jane Grey, his sister-in-law, on the throne. When the plot fell apart, he was committed to the Tower, convicted of treason along with Lady Jane, and his brothers, Henry and Guildford, in November. Although three of the plotters were eventually executed, Ambrose was released and pardoned in October 1554. In 1557 he and his brothers, Henry and Robert (later Earl of Leicester), joined the English troops sent as support troops at the siege of St. Quentin. They fought with conspicuous bravery, Henry was killed. For their service, Queen Mary excepted the surviving brothers and their three sisters from the act of attainder which had fallen on the family as a result of their earlier plot against her. With the succession of Elizabeth I, he was granted the manor of Kibworth Beauchamp, Leicestershire, the office of chief pantler at coronations, and he became master of the ordnance in April 1560. In 1563 he was made a Knight of the Garter, and Baron de L'Isle and Earl of Warwick about 1564. In 1569 he was nominated the queen's lieutenant in the north for the purpose of crushing the rebellion there. In May 1571 he was made chief butler of England and was admitted to the privy council in September 1573. He was the chief promoter of Martin Frobisher's first voyage in 1576. He married three times, but had only one son who died in infancy. He never fully recovered from a leg injury suffered in service, and in later life he was often unable to move about. In February 1590 he died at Bedford House in London ten days after his diseased and gangenous leg was amputated. An elaborate funeral took place in the chapel of the Blessed Virgin at Warwick in April 1590. An altar-tomb for the Earl was erected by his widow.