Question: Whose son's death brought titles to Edward III's most trusted captain?

full_context: Document 1: Thomas Beaufort, Duke of Exeter: Thomas Beaufort, 1st Duke of Exeter, KG (c. 1377 – c. 31 December 1426) was an English military commander during the Hundred Years' War, and briefly Chancellor of England. He was the third of the four children born to John of Gaunt, Duke of Lancaster, and his mistress Katherine Swynford. To overcome their problematic parentage, his parents were married in 1396, and he and his siblings were legitimated on two separate occasions, in 1390 and again in 1397. He married the daughter of Sir Robert Neville (d. 1413) of Hornby, Margaret Neville, who bore him one son, Henry Beaufort. However, the child died young.
Document 2: Edmund Beaufort, 2nd Duke of Somerset: Edmund Beaufort, 2nd Duke of Somerset, KG (1406 – 22 May 1455), sometimes styled 1st Duke of Somerset, was an English nobleman and an important figure in the Wars of the Roses and in the Hundred Years' War. He also succeeded in the title of 4th Earl of Somerset and was created 1st Earl of Dorset and 1st Marquess of Dorset (previously held by his father and later forfeited), and Count of Mortain. He was known for his deadly rivalry with Richard Plantagenet, 3rd Duke of York.
Document 3: Henry of Grosmont, 1st Duke of Lancaster: Henry of Grosmont, 1st Duke of Lancaster, 4th Earl of Leicester and Lancaster, KG (c. 1310 – 23 March 1361), also Earl of Derby, was a member of the English nobility in the 14th century, and a prominent English diplomat, politician, and soldier. The son and heir of Henry, 3rd Earl of Lancaster, and Maud Chaworth, he became one of Edward III's most trusted captains in the early phases of the Hundred Years' War and distinguished himself with victory in the Battle of Auberoche. He was a founding member and the second Knight of the Order of the Garter in 1348, and in 1351 was created duke. An intelligent and reflective man, Grosmont taught himself to write and was the author of the book "Livre de seyntz medicines", a highly personal devotional treatise. He is remembered as one of the founders and early patrons of Corpus Christi College, Cambridge, which was established by two of the guilds of the town in 1352.
Document 4: Thomas Neville (died 1460): Sir Thomas Neville, (c. 1429–1460) was the second son of Richard Neville, 5th Earl of Salisbury, a major magnate in the north of England during the fifteenth-century Wars of the Roses, and a younger brother to the more famous Richard Neville, Earl of Warwick, known as the 'Kingmaker.' Thomas worked closely with them both in administering the region for the Crown, and became a significant player in the turbulent regional politics of Northern England in the early 1450s. His wedding in August 1453 marked the beginning of his family's armed feud with their rivals, the House of Percy, in which Thomas and his brother John led a series of raids, ambushes and skirmishe across Yorkshire against the Percys. Many historians describe the feud as the beginning of the Wars of the Roses, a series of dynastic struggles in mid-fifteenth century England, and Thomas Neville played a large role in his father's alliance with Thomas's uncle, Richard, 3rd Duke of York.
Document 5: Issue of Edward III of England: King Edward III of England is the ancestor of many European monarchs (as well as the issue of many English Dukes, Earls and Viscounts) through his sons Lionel of Antwerp, 1st Duke of Clarence; John of Gaunt, 1st Duke of Lancaster; Edmund of Langley, 1st Duke of York and Thomas of Woodstock, 1st Duke of Gloucester. All of Edward's legitimate children were by his wife Philippa of Hainault.
Document 6: Henry Beaufort, 3rd Duke of Somerset: Henry Beaufort, 3rd Duke of Somerset (26 January 1436 – 15 May 1464) was an important Lancastrian military commander during the English Wars of the Roses. He is sometimes numbered the 2nd Duke of Somerset, because the title was re-created for his father after his uncle died. He also held the subsidiary titles of 5th Earl of Somerset, 2nd Marquess of Dorset and 2nd Earl of Dorset.
Document 7: Henry Beaufort: Henry Beaufort (c. 1375 – 11 April 1447) was a medieval English clergyman, Bishop of Winchester, a member of the royal house of Plantagenet, and a Cardinal of the Roman Catholic Church.
Document 8: House of Lancaster: The House of Lancaster was the name of two cadet branches of the royal House of Plantagenet. The first house was created when Henry III of England created the Earldom of Lancasterfrom which the house was namedfor his second son Edmund Crouchback in 1267. Edmund had already been created Earl of Leicester in 1265 and was granted the lands and privileges of Simon de Montfort, 6th Earl of Leicester, after de Montfort's death and attainder at the end of the Second Barons' War. When Edmund's son Thomas, 2nd Earl of Lancaster, inherited his father-in-law's estates and title of Earl of Lincoln he became at a stroke the most powerful nobleman in England, with lands throughout the kingdom and the ability to raise vast private armies to wield power at national and local levels. This brought himand Henry, his younger brotherinto conflict with their cousin Edward II of England, leading to Thomas's execution. Henry inherited Thomas's titles and he and his son, who was also called Henry, gave loyal service to Edward's sonEdward III of England.
Document 9: House of York: The House of York was a cadet branch of the English royal House of Plantagenet. Three of its members became Kings of England in the late 15th century. The House of York was descended in the male line from Edmund of Langley, 1st Duke of York, the fourth surviving son of Edward III, but also represented Edward's senior line, being cognatic descendants of Lionel, Duke of Clarence, Edward III's second surviving son. It is based on these descents that they claimed the English crown. Compared with the House of Lancaster, it had a senior claim to the throne of England according to cognatic primogeniture but junior claim according to the agnatic primogeniture. The reign of this dynasty ended with the death of Richard III of England in 1485. It became extinct in the male line with the death of Edward Plantagenet, 17th Earl of Warwick in 1499.
Document 10: Humphrey Stafford, 1st Duke of Buckingham: Humphrey Stafford, 1st Duke of Buckingham, 6th Earl of Stafford, {'1': ", '2': ", '3': ", '4': "} (15 August 1402 – 10 July 1460) was an English nobleman and a military commander in both the Hundred Years' War and in the Wars of the Roses. A great-grandson of King Edward III on his mother's side, he inherited his father's earldom of Stafford at an early age. Through his marriage to a daughter of Ralph, Earl of Westmorland, Humphrey was not only related to the powerful Neville family, but many of the leading aristocratic houses of the time. Like his father, he joined the English campaign in France and fought for King Henry V; on the King's death he became a leading councillor for the new King, the six-month old Henry VI. He acted in a peace-making role in the partisan politics of the 1430s, when Humphrey, Duke of Gloucester vied with Cardinal Beaufort for political supremacy, and he was also involved in the arrest of the duke in 1445.
Document 11: Edmund of Langley, 1st Duke of York: Edmund of Langley, 1st Duke of York, KG (5 June 1341 – 1 August 1402) was the fourth surviving son of King Edward III of England and Philippa of Hainault. Like many medieval English princes, Edmund gained his nickname from his birthplace: Kings Langley Palace in Hertfordshire. He was the founder of the House of York, but it was through the marriage of his younger son, Richard of Conisburgh, 3rd Earl of Cambridge, to Anne de Mortimer, great-granddaughter of Edmund's elder brother Lionel of Antwerp, 1st Duke of Clarence, that the House of York made its claim to the English throne in the Wars of the Roses. The other party in the Wars of the Roses, the incumbent House of Lancaster, was formed from descendants of Edmund's elder brother John of Gaunt, 1st Duke of Lancaster, Edward III's third son.
Document 12: Thomas de Courtenay, 5th/13th Earl of Devon: Thomas Courtenay, 5th/13th Earl of Devon (1414–1458) was an English nobleman who was involved in the Wars of the Roses. His seat was Colcombe Castle, near Colyton, Devon, and later the principal historic family seat of Tiverton Castle after his mother's death. Much of his life was spent in armed territorial struggle against his near-neighbour in Devon Sir William Bonville of Shute, Devon, at a time when central control over the provinces was weak. He had been married off as an infant to Margaret Beaufort, granddaughter of John of Gaunt, Duke of Lancaster, and started his career an adherent to the Lancastrian Beaufort party. On the demise of the Beaufort party he abandoned it in favour of the Duke of York. When York sought the support of Courtenay's arch-enemy Bonville, Courtenay fell out of favour with York. The Wars of the Roses led to the deaths and executions of all three of his sons, successively 6th, 7th, and 8th Earls of Devon, and the eventual attainder of his titles and forfeiture of his lands. The Earldom was however revived in 1485 for his distant cousin Sir Edward Courtenay, KG, (d. 1509), third in descent from his great-uncle. The ordinal number given to the early Courtenay Earls of Devon depends on whether the earldom is deemed a new creation by the letters patent granted 22 February 1334/5 or whether it is deemed a restitution of the old dignity of the de Redvers family. Authorities differ in their opinions, and thus alternative ordinal numbers exist, given here.
Document 13: House of Plantagenet: The House of Plantagenet ( ) was a royal house which originated from the lands of Anjou in France. The name Plantagenet is used by modern historians to identify four distinct royal houses – the Angevins who were also Counts of Anjou, the main body of the Plantagenets following the loss of Anjou, and the houses of Lancaster and York, the Plantagenets' two cadet branches. The family held the English throne from 1154, with the accession of Henry II, until 1485, when Richard III died.
Document 14: Serjeant Surgeon: The Serjeant Surgeon is the senior surgeon in the Medical Household of the Royal Household of the Sovereign of the United Kingdom. The origin of the post dates back to 1253. Early Serjeant Surgeons were military surgeons who followed their King into battle. John of Arderne, later famous as the Father of Proctology, accompanied Edward III at the Battle of Crecy in 1346. But the title did not refer to a military rank; the word "Serjeant" comes from the Latin "serviens" or "serving". Over the years, other duties of the Serjeant Surgeon have included embalming of the royal corpse, oversight of torture to ensure the prisoner was not killed, and the screening of applicants to be touched by the King for the cure of the King's Evil (tuberculous glands of the neck)! The first knighthood to be granted to a Serjeant Surgeon was in the reign of Henry VIII, to John Aylef, who was said to have cured the King of a fistula. The first Serjeant Surgeon to receive a peerage was Joseph Lister, the founder of antiseptic surgery, who was created Baron Lister of Lyme Regis in the County of Dorset by Queen Victoria.
Document 15: Catherine Grandison, Countess of Salisbury: Catherine Grandison, Countess of Salisbury (c. 1304 – 23 November 1349) was an English noblewoman, remembered for her relationship with King Edward III of England and possibly the woman in whose honour the Order of the Garter was originated. She was the daughter of William de Grandison, 1st Baron Grandison, and Sibylla de Tregoz. Her mother was one of two daughters of John de Tregoz, Baron Tregoz (whose arms were blazoned "Gules two bars gemels in chief a lion passant guardant or"), maternal granddaughter of Fulk IV, Baron FitzWarin). Catherine married William Montacute, 1st Earl of Salisbury in about 1320.
ground_truth: Thomas, 2nd Earl of Lancaster