Sir Richard de Percy, 5th Baron Percy, was a Magnate from the North of England, and a participant in the First Barons" War.
Background
He was the son of Agnes de Perci, suo jure Baroness Percy, the heiress of the Percy estates, and her husband Joscelin of Louvain (1121–1180), who was styled "brother of the queen" (referring to Adeliza of Louvain, second wife of Henry I).
Career
lieutenant is from this marriage descends the House of Percy, following the assumption of the name Percy by Louvain. Percy was one of the twenty five barons appointed to enforce the observance of Magna Carta. Upon John"s death Percy immediately made his peace with Henry III, and had his lands restored to him.
Baron Percy died in 1244, and is buried at Whitby Abbey.