Question: Who is the paternal grandfather of Thomas Beaufort, Count Of Perche?

Knowledge 1: Thomas Beaufort, Count of Perche
Thomas Beaufort, Count of Perche (c. 1405 – 3 October 1431) was a member of the Beaufort family and an English commander during the Hundred Years' War.He was the third son of John Beaufort, 1st Earl of Somerset and his wife, Margaret Holland.With his elder brother, Henry Beaufort, 2nd Earl of Somerset, Thomas joined in Henry V's 1419 campaigns in France.In 1421, he accompanied the king's younger brother Thomas of Lancaster to the fighting in Anjou.Lancaster was killed at the Battle of Baugé while Somerset and Thomas were captured.Thomas was eventually released around 1427 in a prisoner exchange negotiated by his uncle, Cardinal Beaufort.As an able male member of the Beaufort family, Thomas rejoined the fighting almost immediately.He was granted the title Count of Perche in December 1427, his title being more a claim to land, rather than a recognized title since it was already held by the French Duke John II of Alençon.This was part of a continuing attempt by Cardinal Beaufort to carve out estates for his nephews from conquered French land.During the 1430 royal coronation expedition of Henry VI, Thomas was granted a retinue of 128 soldiers and 460 archers.He commanded soldiers at a battle at La Charité-sur-Loire in late 1430 and died 3 October 1431 at the siege of Louviers, three weeks before the city's fall.Perche died unmarried and childless.Upon his death, his title was extinct. [SEP] Knowledge 2: John Beaufort, 1st Earl of Somerset
John Beaufort, 1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, (c. 1371 – 16 March 1410) was an English nobleman and politician.He was the first of the four illegitimate children of John of Gaunt (1340-1399)(third surviving son of King Edward III) by his mistress Katherine Swynford, whom he later married in 1396.Beaufort's surname (properly "de Beaufortfrom Beaufort") probably reflects his birthplace at his father's castle and manor of Beaufort ("beautiful stronghold") (from 1688 "Montmorency-Beaufort") in Champagne, France, situated 100 miles east of Paris, 25 miles north-east of Troyes, and between the River Seine and River Marne.The Portcullis heraldic badge of the Beauforts, now the emblem of the House of Commons, is believed to have been based on that of the castle of Beaufort, now demolished.The Beaufort children were declared legitimate twice by parliament during the reign of King Richard II of England, in 1390 and 1397, as well as by Pope Boniface IX in September 1396.Even though they were the grandchildren of Edward III and next in the line of succession after their father's legitimate children by his first two wives, the Beauforts were barred from succession to the throne by their half-brother Henry IV.
Knowledge 1: John Beaufort, 1st Earl of Somerset
John Beaufort, 1st Marquess of Somerset and 1st Marquess of Dorset, later only 1st Earl of Somerset, (c. 1371 – 16 March 1410) was an English nobleman and politician.He was the first of the four illegitimate children of John of Gaunt (1340-1399)(third surviving son of King Edward III) by his mistress Katherine Swynford, whom he later married in 1396.Beaufort's surname (properly "de Beaufortfrom Beaufort") probably reflects his birthplace at his father's castle and manor of Beaufort ("beautiful stronghold") (from 1688 "Montmorency-Beaufort") in Champagne, France, situated 100 miles east of Paris, 25 miles north-east of Troyes, and between the River Seine and River Marne.The Portcullis heraldic badge of the Beauforts, now the emblem of the House of Commons, is believed to have been based on that of the castle of Beaufort, now demolished.The Beaufort children were declared legitimate twice by parliament during the reign of King Richard II of England, in 1390 and 1397, as well as by Pope Boniface IX in September 1396.Even though they were the grandchildren of Edward III and next in the line of succession after their father's legitimate children by his first two wives, the Beauforts were barred from succession to the throne by their half-brother Henry IV. [SEP] Knowledge 2: Thomas, Count of Perche
Thomas (1195-20 May 1217), Count of Perche, son of Geoffrey III, Count of Perche, and Richenza-Matilda of Saxony, daughter of Henry the Lion, Duke of Saxony and Bavaria, and Matilda.Only seven when his father died, Thomas became Count of Perche under the regency of his mother and her new husband Enguerrand III, Lord of Coucy.In 1216, the English barons rebelled in the First Barons' War against John Lackland, and offered the English crown to Louis VIII the Lion, King of France.The death of King John ended this arrangement and the crown went to Henry III, John's son.In the end, Louis VIII renounced the English crown, but in the interim fought the forces of William Marshal, 1st Earl of Pembroke.In the decisive Battle of Lincoln (1217), Thomas, the commander of the French forces, was killed.Thomas married Hélisende Rethel, daughter of Hugh II, Count of Rethel, and Felicitas, daughter of Simon of Broyes.This union produced no children.His widow remarried Garnier de Traînel, Seigneur de Marigny.Following Thomas' death in 1217, King Philip II of France would gain control of the castles of Moulins-la-Marche, Bonsmoulin, and Belleme, which had been contested since 1182.Thomas’ uncle William, who was also Bishop of Chalons, succeeded him as the Count of Perche.
Knowledge 1: Thomas Beaufort, Count of Perche
Thomas Beaufort, Count of Perche (c. 1405 – 3 October 1431) was a member of the Beaufort family and an English commander during the Hundred Years' War.He was the third son of John Beaufort, 1st Earl of Somerset and his wife, Margaret Holland.With his elder brother, Henry Beaufort, 2nd Earl of Somerset, Thomas joined in Henry V's 1419 campaigns in France.In 1421, he accompanied the king's younger brother Thomas of Lancaster to the fighting in Anjou.Lancaster was killed at the Battle of Baugé while Somerset and Thomas were captured.Thomas was eventually released around 1427 in a prisoner exchange negotiated by his uncle, Cardinal Beaufort.As an able male member of the Beaufort family, Thomas rejoined the fighting almost immediately.He was granted the title Count of Perche in December 1427, his title being more a claim to land, rather than a recognized title since it was already held by the French Duke John II of Alençon.This was part of a continuing attempt by Cardinal Beaufort to carve out estates for his nephews from conquered French land.During the 1430 royal coronation expedition of Henry VI, Thomas was granted a retinue of 128 soldiers and 460 archers.He commanded soldiers at a battle at La Charité-sur-Loire in late 1430 and died 3 October 1431 at the siege of Louviers, three weeks before the city's fall.Perche died unmarried and childless.Upon his death, his title was extinct. [SEP] Knowledge 2: Thomas, Count of Perche
Thomas (1195-20 May 1217), Count of Perche, son of Geoffrey III, Count of Perche, and Richenza-Matilda of Saxony, daughter of Henry the Lion, Duke of Saxony and Bavaria, and Matilda.Only seven when his father died, Thomas became Count of Perche under the regency of his mother and her new husband Enguerrand III, Lord of Coucy.In 1216, the English barons rebelled in the First Barons' War against John Lackland, and offered the English crown to Louis VIII the Lion, King of France.The death of King John ended this arrangement and the crown went to Henry III, John's son.In the end, Louis VIII renounced the English crown, but in the interim fought the forces of William Marshal, 1st Earl of Pembroke.In the decisive Battle of Lincoln (1217), Thomas, the commander of the French forces, was killed.Thomas married Hélisende Rethel, daughter of Hugh II, Count of Rethel, and Felicitas, daughter of Simon of Broyes.This union produced no children.His widow remarried Garnier de Traînel, Seigneur de Marigny.Following Thomas' death in 1217, King Philip II of France would gain control of the castles of Moulins-la-Marche, Bonsmoulin, and Belleme, which had been contested since 1182.Thomas’ uncle William, who was also Bishop of Chalons, succeeded him as the Count of Perche.

Answer: John of Gaunt