Henry Percy 3rd Earl of Northumberland (25 July 1421 – 29 March 1461) was an English magnate. The Earldom of Northumberland was one of the greatest fifteenth-century landholdings in northern England; Percy also became Lord Poynings on his marriage. This title would bring him into direct conflict with the Poyninngs family themselves and indeed feuds with neighbouring nobles both lay and ecclesiastical would be a key occupancy of his youth.
