John, 8th. Baron Mowbray, was the younger son of his famous father Thomas. Born 1392 at Epworth, Lincolnshire (according to the IGI) he was restored in the parliament of 3 Henry VI (1422) to the dignity of Duke of Norfolk, after having used only the titles of earl of Nottingham and Earl Marshal.

He was engaged in the French Wars of Henry V (who reigned 1413 to 1422) but was prevented by indisposition from sharing in the glories of Agincourt, although the Agincourt Rolls list a troop under the heading Earl Marshal's forces. John was created a Knight of the Garter

He married Katherine Nevil, daughter of Ralph, Earl of Westmoreland, the IGI giving date and place as 12 Jan 1411 in Raby, Durham.

On his death in 1432 he was succeeded by his son John.

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