MOWBRAY, JOHN (V), second Duke of Norfolk (1389–1432), born in 1389, was the younger of the two sons of Thomas Mowbray I, first duke of Norfolk [q. v.], by his second wife, Elizabeth, sister and coheiress of Thomas, earl of Arundel (1381-1415). On the execution of his elder brother, Thomas Mowbray II [q. v.], in June 1405, John Mowbray became earl-marshal and fourth Earl of Nottingham, the ducal title having been withheld since the death of their father. In 1407 he was under the care of his great-aunt, the widow of Humphrey de Bohun, earl of Hereford (1341-1373) [q. v.], and mother-in-law of Henry IV. The latter, who was the youth's guardian, allowed her 200l. a year for his support, being double the provision made for him after his father's death (Ord. Privy Council, i. 100; Wylie, Henry IV). The king took him into his own custody in March 1410, but sixteen months later transferred him to that of the powerful Yorkshire neighbour of the Mowbrays, Ralph Nevill, first earl of Westmorland [q. v.], whom he had in 1399 invested for life with the office of marshal of England, previously hereditary in the Mowbray family (ib.) Westmorland, who was systematically marrying his daughters to the heirs of other great houses, at once contracted the earl-marshal to Catherine, his eldest daughter by his second wife, Joan Beaufort, the king's half-sister. The marriage license bears date 13 Jan. 1412 (Testamenta Eboracensia, iii. 321).
Mowbray was not given livery of his lands until a fortnight before Henry's death, two days after which he was summoned to Henry Vs first parliament as earl-marshal (Doyle, Official Baronage). There is some reason to believe that his father-in-law then resigned the office of marshal of England into his hands (Gregory, Chron. ; Rot. Parl. iv. 270). When the king discovered the Earl of Cambridge's plot on the eve of his expedition to France in July 1415, the earl-marshal was the chief member of the judicial commission which investigated the conspiracy (ib. iv. 65). He was one of the peers who subsequently (5 Aug.) passed final sentence upon Cambridge and Lord le Scrope (ib. p. 66). A few days later he crossed to France with the king, and took part in the siege of Harfleur at the head of fifty men-at-arms and 150 horse-archers (DOYLE). But he was presently seized with illness, and was invalided home (Walsingham, ii. 309). The statement in Harleian MS. 782 that he was present at Agincourt must be wrong (Doyle). From the summer of 1417, however, he was constantly in France. He took a prominent part in the siege of Caen in August 1417, and in that of Rouen twelvemonths later (Gesta Henrici V, pp. 124, 270 ; Paston Letters, i. 10 ; Historical Collections of a London Citizen, ed. Camden Soc., pp. 7, 23 ; Walsingham, ii. 322). At the beginning of 1419 the towns of Gournay and Neufchastel in Bray, between Dieppe and Beauvais, were placed in his charge (Doyle). In April and May of the following year he and the Earl of Huntingdon were covering the siege of Fresnay le Vicomte in Maine by the Earl of Salisbury, and on 16 May routed the Dauphin's forces near Le Mans, slaying five thousand men, including a hundred Scots (Walsingham, ii. 331 ; Elmham, p. 244 ; Gesta Henrici V, pp. 133-4; R. Triger, Fresnay le Vicomte in Revue Historique du Maine, 1886, xix. 189). The author of the 'Gesta' (p. 144) says he was present at the protracted siege of Melun, which began in July. It is doubtful whether he returned to England with the king in February 1421 and bore the second sceptre at Catherine's coronation (Gregory, p. 139 ; Three Fifteenth-Century Chronicles, p. 57 ; but cf. Walsingham, ii. 336). Henry had appointed him governor of Pontoise before his departure, and he witnessed a document at Rouen in the middle of April (Doyle ; Memoires de la Société des Antiquités de Normandie, 1858, vol. xxiii. pt. i. No. 1498). Shortly after (3 May) he was given the Garter vacated by the death of Sir John Grey (Beltz, Memorials of the Garter, p. clviii).
The earl-marshal was present in the council which decided on 5 Nov. 1422 that the Duke of Gloucester should conduct the first parliament of Henry VI as royal commissioner, and not as regent, and on 9 Dec. he was nominated one of the five earls in the new council appointed to carry on the government with the protector (Rot. Parl. iv. 175 ; Ord. Privy Council, iii. 6, 16, iv. 101). In May 1423 he and Lord Willoughby took reinforcements to France, and, after perhaps sharing in the victory of Cravant (30 July), he assisted the Burgundian commander, John of Luxemburg, in expelling the French from the districts of Laon and Guise (ib. pp. 87, 101 ; Wavrin, pp. 33, 70-5). With only six hundred English he scattered the Count of Toulouse's force, and, driving part of them into the fortress of La Follye, captured and destroyed it (ib.)
