|1st Baron Egremont|
|Tenure||20 November 1449 – 10 July 1460|
|Born||29 November 1422|
|Died||10 July 1460 37) (aged|
Battle of Northampton
|Wars and battles|| Percy-Neville feud |
• Battle of Heworth Moor
Wars of the Roses
• Battle of Northampton
|Issue||John Egremont (illegitimate) |
|House||House of Percy|
|Father||Henry Percy, 2nd Earl of Northumberland|
Thomas Percy, 1st Baron Egremont (29 November 1422 – 10 July 1460) was a scion of a leading noble family from northern England during the fifteenth century. Described by one historian as "quarrelsome, violent and contemptuous of all authority",  Egremont was involved in numerous riots and disturbances in the northern localities, and became a leading figure in the internecine Percy–Neville feud. When the Wars of the Roses began mid-decade, Egremont fought for the king on the Lancastrian side, being killed five years later at the Battle of Northampton.
His youth was rarely peaceful; at the age of twenty five he was part of a force that engaged the tenants of the Archbishop of York, John Kemp in a physical confrontation (possibly to the disapproval of his father and elder brother, Henry, Lord Poynings,  although it is equally possible that he began a 'propaganda campaign' against Kemp at the same time)  outside the village of Stamford Bridge.  Following the skirmish with the men of Beverley, he was subsequently imprisoned at York Castle- the direct result, it has been suggested of the Archbishop manipulating the jury and County Sheriff, whilst getting his own tenants released instead.  It is possible that the king's clear support for the Archbishop, notwithstanding their position as one of the region's greatest magnatial families, was influential in their decision to later feud with the Percies rather than take it to the king for arbitration. 
Conflict in the north was not only over local rivalries; English relations with Scotland periodically descended into warfare throughout the Middle Ages, and the mid-fifteenth century was no exception.  However, Egremont seems not to have been part of the campaign of October 1448, when his father the earl and his brother Lord Poyning's led an army of 6,000 men across the border only to be routed at the Battle of Sark; Poynings himself was captured, to be eventually ransomed by the Scots. 
Cockermouth, in Cumberland, held by Thomas Percy, was a traditional Percy Honour, as was that of Egremont; it is likely to have been due to his father's influence at court, as the earl of Northumberland was currently a Royal Councillor, and his connections with the king's chief minister Cardinal Beaufort  that on 20 November 1449 he was made Lord Egremont by Letters Patent, drawing £10 per annum from the county revenues.  This figure reflects the fact that Egremont was never to be a wealthy man; it has been calculated that the Percy Cumberland estates suffered a decline of 25% between 1416 and 1470.  Equally diminishing to Egremont's income was the fact that the barony itself had been divided threeways through inheritances, and at least one-third of it- that of the Fitzwalter family- had been granted to the earl of Salisbury under a 40-year lease at the time of Thomas Percy's grant. 
It is not certain exactly when the bad blood between the two families begun; A. J. Pollard has pointed out that they were cooperating together over parliamentary elections in 1449, and as late as 1453; the former husting was attended by Sir Thomas Percy shortly before his elevation to the peerage. 
Richard Neville, 16th Earl of Warwick, known as Warwick the Kingmaker, was an English nobleman, administrator, and military commander. The eldest son of Richard Neville, 5th Earl of Salisbury, he became Earl of Warwick through marriage, and was the wealthiest and most powerful English peer of his age, with political connections that went beyond the country's borders. One of the leaders in the Wars of the Roses, originally on the Yorkist side but later switching to the Lancastrian side, he was instrumental in the deposition of two kings, which led to his epithet of "Kingmaker".
Richard Neville, 5th Earl of Salisbury was an English nobleman and magnate based in northern England who became a key supporter of the House of York during the early years of the Wars of the Roses. He was the father of Richard Neville, 16th Earl of Warwick, the "Kingmaker".
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Henry Percy, 2nd Earl of Northumberland was an English nobleman and military commander in the lead up to the Wars of the Roses. He was the son of Henry "Hotspur" Percy, and the grandson of Henry Percy, 1st Earl of Northumberland. His father and grandfather were killed in different rebellions against Henry IV in 1403 and 1408 respectively, and the young Henry spent his minority in exile in Scotland. Only after the death of Henry IV in 1413 was he reconciled with the Crown, and in 1414 he was created Earl of Northumberland.
Henry Percy, 3rd Earl of Northumberland, was an English magnate.
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John Fitzalan, 6th Earl of Arundel, 3rd Baron Maltravers was an English nobleman.
The Percy–Neville feud was a series of skirmishes, raids, and vandalism between two prominent northern English families, the House of Percy and the House of Neville, and their followers, that helped provoke the Wars of the Roses. The original reason for the long dispute is unknown, and the first outbreaks of violence were in the 1450s, prior to the Wars of the Roses. The antagonists would later meet in battle several times during the feud.
Earl of Egremont was a title in the Peerage of Great Britain. It was created in 1749, along with the subsidiary title Baron of Cockermouth, in Cumberland, for Algernon Seymour, 7th Duke of Somerset, with remainder to his nephews Sir Charles Wyndham, 4th Baronet, of Orchard Wyndham, and Percy Wyndham-O'Brien. The Duke had previously inherited the Percy estates, including the lands of Egremont in Cumberland, from his mother Lady Elizabeth Percy, daughter and heiress of Joceline Percy, 11th Earl of Northumberland. In 1750 Sir Charles Wyndham succeeded according to the special remainder as second Earl of Egremont on the death of his uncle. His younger brother Percy Wyndham-O'Brien was created Earl of Thomond in 1756.
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William Bonville, 1st Baron Bonville, was an English nobleman and an important, powerful landowner in south-west England during the Late Middle Ages. Bonville's father died before Bonville reached adulthood. As a result, he grew up in the household of his grandfather and namesake, who was a prominent member of the Devon gentry. Both Bonville's father and grandfather had been successful in politics and land acquisition, and when Bonville came of age, he gained control of a large estate. He augmented this further by a series of lawsuits against his stepfather, Richard Stucley. Bonville undertook royal service, which then meant fighting in France in the later years of the Hundred Years' War. In 1415, he joined the English invasion of France in the retinue of Thomas, Duke of Clarence, Henry V's brother, and fought in the Agincourt campaign. Throughout his life, Bonville was despatched on further operations in France, but increasingly events in the south-west of England took up more of his time and energy, as he became involved in a feud with his powerful neighbour Thomas Courtenay, Earl of Devon.
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Thomas de la More was a fifteenth-century Sheriff of Cumberland. Little is known of his early life, but he was a loyal royal official in Cumberland and Westmorland for all his adult life, serving as Member of Parliament, Escheator and Justice of the Peace on multiple occasions. A man of social and political significance in the area, he eventually became involved in the struggle for local supremacy in the 1450s between the Neville and Percy families. This led to him and his men being beaten and threatened by Thomas Percy, Lord Egremont, over which he petitioned the royal council in 1455. De la More played no active part in the Wars of the Roses which broke out the same year. He is known to have married twice. His first wife, called either Idione or Maud, died first, but his second, Margaret, survived him.
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