. . . . . . . . "Algernon Percy, 4th Duke of Northumberland" . . . . "Algernon Percy, 5th Baron Percy, 4th Duke of Northumberland" . . . . . . . . . . "Algernon, 1st Baron Prudhoe" . . . . "Algernon Percy, 4th Duke of Northumberland" . . . . . . . . . . . . . . . . . . . . . . "The 4th Duke of Northumberland" . . . . . . . . . . "His Grace
Algernon Percy
4th '''Duke of Northumberland'''
PC" . . "Algernon" . . . "1792-12-15" . . "Algernon, 4th Duke of Northumberland" . "Algernon Percy, 4th Duke of Northumberland, KG" . . . . . . . . . . . . . . . "Duke's" . . . . . "Duke of Northumberland" . "1865" . "Fourth Duke of Northumberland" . . . . . . . . "The Duke of Northumberland" . . . . "Algernon Percy,
'''4th Duke of Northumberland'''" . "Algernon Percy, Lord Prudhoe" . . . . . . . . "Algernon Percy" . . . "4th Duke of Northumberland" . "Lord Prudhoe" . . "1792" . . . "4th Duke" . .