Henry Percy, 1st Earl of Northumberland, English politician, Earl Marshal of England (born 1341)

Henry Percy, 1st Earl of Northumberland, 4th Baron Percy, titular King of Mann, KG, Lord Marshal was the son of Henry de Percy, 3rd Baron Percy, and a descendant of Henry III of England. His mother was Mary of Lancaster, daughter of Henry, 3rd Earl of Lancaster, son of Edmund, Earl of Leicester and Lancaster, who was the son of Henry III.

Earl Marshal is a hereditary royal officeholder and chivalric title under the sovereign of the United Kingdom used in England. He is the eighth of the great officers of State in the United Kingdom, ranking beneath the Lord High Constable of England and above the Lord High Admiral. The dukes of Norfolk have held the office since 1672.

February 20 is the 51st day of the year in the Gregorian calendar; 314 days remain until the end of the year.