Algernon Percy British diplomat (1779–1833) (1779–1833) Parents Isabella Percy, Countess of Beverley Algernon Percy, 1st Earl of Beverley Children Siblings George Percy, 5th Duke of Northumberland William Henry Percy Elizabeth Percy Hugh Percy Josceline Percy Francis Percy Lady Emily Percy Lady Louisa Percy Charlotte Ashburnham, Countess of Ashburnham Henry Percy Lord Charles Greatheed Bertie Percy