Lord William Percy British Army officer (1882–1963) Parents Henry Percy, 7th Duke of Northumberland Edith Campbell Children Henry Percy Gerald Percy Siblings Lady Muriel Percy Mary Percy Lady Margaret Percy Lord James Percy Louisa Percy Alan Percy, 8th Duke of Northumberland Josceline Percy Henry Percy, Earl Percy Lady Victoria Percy Ralph Percy Eustace Percy, 1st Baron Percy of Newcastle Lady Edith Percy Partners Mary Campbell Swinton