Background
Euston was the son of Augustus Fitzroy, 3rd Duke of Grafton and his wife Anne, daughter of Henry Liddell, 1st Baron Ravensworth.
Euston was the son of Augustus Fitzroy, 3rd Duke of Grafton and his wife Anne, daughter of Henry Liddell, 1st Baron Ravensworth.
He was educated at Harrow School and Trinity College, Cambridge, where he became a close friend of the William Pitt the Younger.
Euston held that seat until he succeeded his father in the dukedom in 1811. Grafton married Lady Charlotte Maria Waldegrave (1761–1808), daughter of James Waldegrave, 2nd Earl Waldegrave, on 16 November 1784 at Navestock, Essex. They had eleven children:
Lady Maria (Mary) Anne (1785–1855), married Sir William Oglander, 6th Baronet and had issue.
Lady Georgiana (1787–1855), unmarried
Henry, styled Earl of Euston, later 5th Duke of Grafton (1790–1863)
Lord Charles FitzRoy (1791–1865), married Lady Anne Cavendish (daughter of George Cavendish, 1st Earl of Burlington) and had issue.
Lady Isabella Frances (1792–1875), married Henry Joseph Saint John (d 1857)
Lord William FitzRoy (1794–1804)
Lord Hugh FitzRoy (1795–1797)
Lord Richard FitzRoy (1798–1798)
Lord Richard FitzRoy (1800–1801)
Lord James FitzRoy (1804–1834).
1st United Kingdom Parliament. 2nd United Kingdom Parliament. 3rd United Kingdom Parliament.
4th United Kingdom Parliament.
15th Parliament of Great Britain. 16th Parliament of Great Britain.
17th Parliament of Great Britain. 18th Parliament of Great Britain]
From 1782-1784, he was Member of Parliament for Thetford, and in 1784, he and Pitt were elected as MPs for Cambridge University.