George Henry FitzRoy, 4th Duke of Grafton, KG, styled Earl of Euston until 1811, was a British peer and Whig politician who sat in the House of Commons from 1782 to 1811 when he succeeded to the Dukedom.

Augustus Henry FitzRoy, 3rd Duke of Grafton,, 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.