Henry Percy, 2nd Earl of Northumberland was an English nobleman and military commander in the lead up to the Wars of the Roses. He was the son of Henry "Hotspur" Percy, and the grandson of Henry Percy, 1st Earl of Northumberland. His father and grandfather were killed in different rebellions against Henry IV in 1403 and 1408 respectively, and the young Henry spent his minority in exile in Scotland. Only after the death of Henry IV in 1413 was he reconciled with the Crown, and in 1414 he was created Earl of Northumberland.

Sir Henry Percy, nicknamed Hotspur or Harry Hotspur, was an English knight who fought in several campaigns against the Scots in the northern border and against the French during the Hundred Years' War. The nickname "Hotspur" was given to him by the Scots as a tribute to his speed in advance and readiness to attack. The heir to a leading noble family in northern England, Hotspur was one of the earliest and prime movers behind the deposition of King Richard II in favour of Henry Bolingbroke in 1399. He later fell out with the new regime and rebelled, and was slain at the Battle of Shrewsbury in 1403 at the height of his fame.