James Stuart-Wortley-Mackenzie British politician (1747-1818) (1747–1818) Parents Mary Stuart, Countess of Bute John Stuart, 3rd Earl of Bute Children John Stuart-Wortley James Stuart-Wortley, 1st Baron Wharncliffe Louisa Stuart-Wortley Mary Stuart-Wortley George Stuart-Wortley Siblings Louisa Stuart Jane Stuart Lady Caroline Stuart Charles Stuart Anne Stuart John Stuart, 1st Marquess of Bute William Stuart Lady Mary Stuart Frederick Stuart Lady Augusta Corbett Partners Margaret Cunynghame