Sir Philip Courtenay ( – 29 July 1406), of Powderham, Devon was the fifth son of Hugh Courtenay, 10th Earl of Devon (1303–1377). He was the founder of the cadet dynasty known as "Courtenay of Powderham", seated at the manor of Powderham, until then a former Bohun manor of little importance, whilst the line descended from his elder brother, the Earls of Devon of the mediaeval era, continued to be seated at Tiverton Castle and Okehampton. Origins Sir Philip Courtenay was the fifth son of eight sons of Hugh Courtenay, 10th Earl of Devon (1303–1377) and Margaret de Bohun, daughter of Humphrey de Bohun, 4th Earl of Hereford by his wife Elizabeth Plantagenet (1282–1316), a daughter of King Edward I. Military and naval career He was known as a rash, angry and temperamental man but was skilful in naval and military affairs. Philip served during the Spanish War. He was with Edward the Black Prince at the famous victory of the Battle of Najera. He was knighted before the battle with his brothers Peter Courtenay, K.G., and Hugh Courtenay, K.G. On his return, Sir Philip was made Admiral of the West on 7 October 1372 responsible for defending a coast plagued by pirates he held that post until 16 July 1376. In 1373 he was put in charge of a large supply convoy to Gascony. In August, the expedition took the Castle of Gurry. Back in England, he launched a petition to parliament protesting against the corruption of the Stannaries, which he claimed was preventing the protection and patrol of the coastline. That August, Philip was engaged with Peter in a desperate battle against the Spaniards during which they were both captured as supplies failed to get through to Gascony. Two Bristol burgesses paid a large ransom for their release. In return, they were granted trading exemptions from customs tax. On 8 March 1380 he was once again appointed Admiral of the West till 1381. In February 1383, he became Lord Lieutenant of Ireland, serving for 10 years under King Richard II. He attended the parliament that met at Salisbury in April 1384, but in July his duties were taken over by the deputies. In 1385 the King gave him powers of administration in Dublin. He did not stay long and returned to London on 6 May. That Christmas the Great Council met to discuss charges of extortion levelled at