The title of Duke of Grafton was created in 1675 by King Charles II for his illegitimate son with Barbara Villiers, Duchess of Cleveland.
The actual title of Grafton refers to the Honour of Grafton in Northamptonshire, although the family seat is Euston Hall in Suffolk.
His Grace, Henry FitzRoy, is the 12th and current Duke of Grafton, a title he inherited from his grandfather in 2011.
The FitzRoy family has included some notable figures, including:
- Henry, First Duke of Grafton was Vice Admiral of England and killed at the siege of Cork.
- The 1st Duchess of Grafton was betrothed at age five and married at twelve. She was heiress to large estates in London including Euston after which the railway station is named.
- The 3rd Duke was the youngest British Prime Minister after William Pitt and served from 1767 to 1770. He was dismissed by George III for championing greater independence for the American colonies.
- Admiral Robert FitzRoy commanded The Beagle with Charles Darwin on his scientific expeditions.
- The 11th Duchess of Grafton has been a Lady of the Bedchamber since 1953 and Mistress of the Robes to Queen Elizabeth II since 1967.
- The current Countess of Euston was appointed Lord Lieutenant for Suffolk in 2015 and is the first woman to hold this office in the County.