Question: Who is the paternal grandmother of Hugh Le Despenser, Baron Le Despenser (1338)?

Knowledge 1: Hugh le Despenser, Baron le Despenser (1338)
Hugh le Despenser, 2nd Baron le Despenser (1308–1349), Lord of Glamorgan, was the eldest son and heir of Hugh Despenser the Younger and grandson of Hugh le Despenser, 1st Earl of Winchester.His father and grandfather were both executed in 1326.His mother was Eleanor de Clare, "suo jure" Lord of Glamorgan, daughter of Gilbert de Clare, 6th Earl of Hertford and Joan of Acre.Through his mother, Hugh was a great grandson ofKing Edward I. He married Elizabeth Montague (d.1359), and both are buried in Tewkesbury Abbey, Gloucestershire, which abbey was founded by Robert Fitzhamon (d.1107), the first Norman feudal baron of Gloucester and Lord of Glamorgan. [SEP] Knowledge 2: Hugh Despenser the younger
Hugh le Despenser, 1st Lord Despenser (c. 1286 – 24 November 1326), also referred to as "the younger Despenser", was the son and heir of Hugh le Despenser, Earl of Winchester (the elder Despenser) by his wife Isabella de Beauchamp, daughter of William de Beauchamp, 9th Earl of Warwick.He rose to national prominence as royal chamberlain and a favourite of Edward II of England.Despenser made many enemies across the nobility of England which, after the overthrow of Edward, eventually led to him being charged with high treason and ultimately hanged, drawn and quartered.
Knowledge 1: John FitzAlan, 2nd Baron Arundel
John FitzAlan, 2nd Baron Arundel, 2nd Baron Maltravers" jure matris", also called John de Arundel( 30 November 1364 – 14 August 1390), of Buckland, Surrey, was the son of John FitzAlan, 1st Baron Arundel and Eleanor Maltravers.John was with the army in Scotland in 1383 and with the English Fleet in the western coast of France.He married Elizabeth le Despenser, daughter of Edward le Despencer, 1st Baron le Despencer( Despenser), by Elizabeth Burghersh, daughter and heiress of Bartholomew de Burghersh, 2nd Baron Burghersh.They had: Sir John de Arundel, 2nd Lord Arundel, died on 14 August 1390, and was buried at Missenden Abbey, Buckinghamshire. [SEP] Knowledge 2: Elizabeth de Burghersh, 3rd Baroness Burghersh
Elizabeth Despencer, 3rd Baroness Burghersh( c. 1342 – August 1402) was an English noblewoman born to Bartholomew de Burghersh, 2nd Baron Burghersh and Cicely Weyland.Some recently constructed genealogies purport that she was first married, some time after 1347, to Maurice FitzGerald, 4th Earl of Kildare( d. 25 August 1390) and by him had at least four children.Yet it is more consistent with known dates of death of the 4th Earl of Kildare that he married instead Margaret, a daughter of the 1st Baron Burghersh.Otherwise there would be record of Kildare's divorce from Elizabeth and probably a mention in the original records of her' remarriage' rather than of her' marriage' to le Despencer.She was married( it is said for the second time) some time before 1373, to Edward le Despencer, 1st Baron le Despencer( c. 24 March 1335- 6 – 11 November 1375) and they had six children.Upon the death of her father on 5 April 1369, she inherited the title of Baroness Burghersh.
Knowledge 1: Hugh le Despenser, Baron le Despenser (1338)
Hugh le Despenser, 2nd Baron le Despenser (1308–1349), Lord of Glamorgan, was the eldest son and heir of Hugh Despenser the Younger and grandson of Hugh le Despenser, 1st Earl of Winchester.His father and grandfather were both executed in 1326.His mother was Eleanor de Clare, "suo jure" Lord of Glamorgan, daughter of Gilbert de Clare, 6th Earl of Hertford and Joan of Acre.Through his mother, Hugh was a great grandson ofKing Edward I. He married Elizabeth Montague (d.1359), and both are buried in Tewkesbury Abbey, Gloucestershire, which abbey was founded by Robert Fitzhamon (d.1107), the first Norman feudal baron of Gloucester and Lord of Glamorgan. [SEP] Knowledge 2: Hugh Despenser (justiciar)
Hugh le Despencer, 1st Baron le Despencer( 1223 – 4 August 1265) was an important ally of Simon de Montfort during the reign of Henry III.He served briefly as" Justiciar" of England in 1260 and as Constable of the Tower of London.Hugh Le Despenser, chief justiciar of England, first played an important part in 1258, when he was prominent on the baronial side in the Mad Parliament of Oxford.In 1260 the barons chose him to succeed Hugh Bigod as Justiciar, and in 1263 the king was further compelled to put the Tower of London in his hands.He was the son of Hugh le Despenser and was summoned to Parliament by Simon de Montfort.Hugh was summoned as Lord Despencer Dec. 14, 1264 and was Chief Justiciar of England and a leader of the baronial party, and so might be deemed a baron, though the legality of that assembly is doubtful.He remained allied with Montfort to the end, and was present at the Battle of Lewes.He was killed fighting on de Montfort's side at the Battle of Evesham in August, 1265.He was slain by Roger Mortimer, 1st Baron Wigmore; this caused a feud to begin between the Despencer and the Mortimer families.By his wife, Aline Bassett, he was father of Hugh Despenser' the elder', Earl of Winchester.Aline was the daughter of Philip Basset, who had also served as Justiciar.They also had a daughter named Eleanor le Despencer, who married Sir Hugh de Courtenay, feudal baron of Okehampton.

Answer: Isabella de Beauchamp