High Quality Content by WIKIPEDIA articles! Marquess of Exeter is a title that has been created twice, once in the Peerage of England and once in the Peerage of the United Kingdom. The first creation came in the Peerage of England in 1525 for Henry Courtenay, 2nd Earl of Devon. For more information on this creation, which was forfeited in 1538, see the Earl of Devon. The title is chiefly associated with the Cecil family, descended from the courtier Richard Cecil of the parish of Stamford Baron St Martin in Northamptonshire. His only son, Sir William Cecil, was a prominent statesman and served as Secretary of State, Lord High Treasurer and Lord Privy Seal. In 1571 he was created Baron Burghley, in the County of Northampton, in the Peerage of England. His son from his second marriage to Mildred Cooke, Sir Robert Cecil, was created Earl of Salisbury in 1605 and is the ancestor of the Marquesses of Salisbury.