Henry Percy, 4th Earl of Northumberland English noble (1449–1489) Parents Eleanor de Poynings, Baroness de Poynings Henry Percy, 3rd Earl of Northumberland Children Sir William Percy Maud Percy Henry Percy, 5th Earl of Northumberland Anne Percy Alan Percy Eleanor Percy, Duchess of Buckingham Lady Elizabeth Percy Jocelyn Percy Siblings Margaret Percy Lady Elizabeth Percy Lady Anne Percy Lady Eleanor Percy Partners Maud Herbert