Louisa Stuart-Wortley (1781-1848) (1781–1848) Parents Margaret Cunynghame James Stuart-Wortley-Mackenzie Children Lady Louisa Percy Lord Josceline Percy Margaret Percy Lord Henry Percy Algernon Percy, 6th Duke of Northumberland Siblings James Stuart-Wortley, 1st Baron Wharncliffe Mary Stuart-Wortley George Stuart-Wortley John Stuart-Wortley Partners George Percy, 5th Duke of Northumberland