Henry FitzRoy, 1st Duke of Grafton, KG (28 September 1663 – 9 October 1690) was an illegitimate son of King Charles II of England and his mistress Barbara Villiers. A military commander, Henry FitzRoy was appointed colonel of the Grenadier Guards in 1681 and Vice-Admiral of England from 1682 to 1689.
Augustus Henry FitzRoy, 3rd Duke of Grafton, KG, PC (28 September 1735 – 14 March 1811), styled Earl of Euston between 1747 and 1757, was a British Whig statesman of the Georgian era. He is one of a handful of dukes who have served as prime minister .
Grafton is the son of James Oliver Charles FitzRoy, Earl of Euston (1947–2009), and his wife, Lady Clare Amabel Margaret Kerr, one of the daughters of the 12th Marquess of Lothian. His ancestor Henry FitzRoy, 1st Duke of Grafton (1663–1690), was a bastard of King Charles II by his mistress Barbara Villiers.
Henry FitzRoy, 1st Duke of Grafton (1663–1690), second illegitimate son of Charles II and the Duchess of Cleveland; Other titles (2nd–9th Dukes): Earl of Arlington and Viscount Thetford (1672), Baron Arlington (1664), Baron Arlington (1672)
David Somerset, 11th Duke of Beaufort; Lady Caroline Jane Thynne; Henry John FitzRoy Somerset, 12th Duke of Beaufort (born 22 May 1952), styled Marquess of Worcester between 1984 and 2017, also known as Harry Beaufort or Bunter Beaufort, previously as Bunter Worcester, is an English peer and landowner, with estates in Gloucestershire and Wiltshire based on Badminton House
He descends through Henry FitzRoy, 1st Duke of Grafton born to the King's mistress Barbara Villiers. Charles had many children but none legitimate; at his death, the crown passed to his brother, a Catholic who was deposed and whose progeny were excluded on that basis, save for his two daughters raised as Protestants.
Henry Charles FitzRoy Somerset, 8th Duke of Beaufort (1824–1899), only son of the 7th Duke Henry Adelbert Wellington FitzRoy Somerset, 9th Duke of Beaufort (1847–1924), eldest son of the 8th Duke Henry Hugh Arthur FitzRoy Somerset, 10th Duke of Beaufort (1900–1984), only son of the 9th Duke, died without issue, at which point his two Baronies fell into abeyance.