"Postrema voce legavit cor comitissa
Pars melior toto fuit huc pro corpore missa
Hæc se divisit dominum recolendo priorem
Huc cor quod misit verum testatur amorem
His simul ecclesiæ sanctæ suffragia prosint
Ut simul in requie cælesti cum Domino sint."
Gilbert de Clare bequeathed to the Abbey the manor called Mythe, on the hill just outside the town, and Isabelle also left to it many relics, besides vestments, and much valuable church furniture.
On the death of Gilbert de Clare, his son Richard became a ward of the King. Marrying Margaret de Burgh, a daughter of the great Earl of Kent, without permission, he incurred the royal displeasure, and was eventually forced to divorce his young wife in favour of the lady chosen for him. He supported the barons against the King, with whom he had never been in agreement. In 1262 he died, and was buried in the Abbey. One of his wife's sisters married Robert Bruce, competitor for the Scottish Crown and grandfather of King Robert Bruce.
His son Gilbert the second, Rufus or Rubens, i.e. Red, is another well-known figure. Like his father, he at first supported the barons, but soon after the battle of Lewes he took the King's side, and fought for him at Evesham. Again from pique he deserted him, returning to his allegiance once more in 1270. He was buried in the Abbey in 1295.
Gilbert de Clare the third, who was born at Tewkesbury in 1291, was perhaps the most famous of the De Clares. Whilst he was still in early manhood, he was twice chosen by Edward II. to serve as Regent of England in his absence, once even before he had attained full age. His promising career was cut short at Bannockburn in 1314, and the last of the De Clares was buried in the Choir in 1314, his widow being placed later by his side.
The lordship of Tewkesbury then passed from the De Clares, who had held it for ninety years, to Eleanor, Gilbert's eldest sister. By her marriage in 1321 to Hugh le Despenser, the lordship came into the hands of the Despensers. This Hugh the younger, or Hugo Secundus as the Register calls him, was too faithful a supporter of Edward II., and he paid for his fidelity with his life in 1326, having been hanged, drawn, and quartered in Hereford about three weeks after his aged father had suffered a similar fate at Bristol. His remains were collected and buried in the tomb at the back of the sedilia, where Abbot John's tomb was placed at a later date.
The next lord of Tewkesbury was Hugh, the son of Hugh the younger and Eleanor de Clare. His tomb is to be seen on the north side of the high altar, with his effigy upon it, together with that of his wife, the Lady Elizabeth, who, though thrice married, preferred to be buried with him. She retained the manor of Tewkesbury after her marriage to Sir Guy de Brien, and on her death in 1359 it passed to her nephew, Edward le Despenser.
This Edward le Despenser took part in the battle of Poitiers, and was one of the first Knights of the Garter. On his death at Cardiff in 1375 his body was brought to Tewkesbury, and his effigy is to be seen on the roof of the Trinity Chapel on the south side of the high altar. He was buried close to the presbytery, and his wife was, in 1409, buried next to him.
Thomas le Despenser, the third son of Edward, was for two years only Earl of Gloucester, and being attainted, was executed at Bristol in 1400. No trace remains of his grave at Tewkesbury.