Francis George Godolphin D'Arcy D'Arcy-Osborne, 7th Duke of Leeds, styled Earl of Danby from birth until 1799 and Marquess of Carmarthen from 1799 until 1838, was a British peer and politician.

George William Frederick Osborne, 6th Duke of Leeds,, styled Earl of Danby until 1789 and Marquess of Carmarthen from 1789 to 1799, was a British peer and politician. He served as Master of the Horse between 1827 and 1830. He also was Governor of Scilly.