Sources

1) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Margaret de Warbelton...The manor, held for her life of the heir of Hugh Plecy, as of the fee of Oyly (Doyly), by knight’s service, with reversion to Hugh le Despencer, earl of Winchester, and his heirs...Edward le Despencer, aged 24 years and more, son and heir of Edward le Despencer, brother and heir of Hugh le Despencer, son and heir of Hugh le Despencer, son and heir of the aforesaid Hugh le Despencer, earl of Winchester, is her heir."Dated: 1366. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol12/pp51-65. Reference: C 135/188/14 (Data from secondary evidence)
2) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "Anne, late the wife of Edward le Despenser... the manor is of the inheritance of Edward le Despenser, son of the said Edward and Anne, who is 25 years of age and more and his father’s heir....She died on 8 August last." Date: 1367. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol12/pp105-118. Reference: C 135/193/4 (Data from secondary evidence)
3) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "EDWARD, SON OF EDWARD LE DESPENSER, KINSMAN AND HEIR OF HUGH LE DESPENSER...Edward le Despenser, the father, married Anne, daughter of William de Ferariis, knight, at Groby, co. Leicester, on 20 April, 9 Edward III, and of her begat the said Edward, who was born at Esynden on 24 March, 10 Edward III, and was baptised on the same day in the church of St. Mary Magdalene there". Date: 1356. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol10/pp274-292. Reference: C 135/135/10 (Data from direct source)
4) Source: Chancery: Inquisitions Post Mortem, Series I, Edward III "EDWARD LE DESPENSER, knight...Thomas le Despenser, aged 2 years and more, is his son and next heir... He died on 12 November last." Date: 1375. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol14/pp214-227. Reference: C 135/253/1 (Data from direct source)
5) Source: Special Collections: Ancient Petitions "Edward le Despenser, knight... Despenser requests that he be granted livery of his lands and issues of Killoteran which are in right of his wife... Elizabeth [le Despenser], wife of the petitioner, and daughter of Bartholomew de Burgherssh; Bartholomew de Burwasshe (Burghersshe)." Date: 1373. External Link
https://discovery.nationalarchives.gov.uk/details/r/C9334858. Reference: SC 8/226/11298