Isabella de Beauchamp

Isabella de Beauchamp, Lady Kidwelly, Baroness Despenser ( – before 30 May 1306), was an English noblewoman and wealthy heiress.

Family Lady Isabella, or Isabel de Beauchamp, was born in about 1263 in Warwickshire, England. She was the only daughter of William de Beauchamp, 9th Earl of Warwick and Matilda FitzJohn Phillip le Despenser (died 1313), married as his first wife Margaret de Goushill, by whom he had issue.

Lady Despenser died sometime before 30 May 1306. Twenty years later, her husband and eldest son, favourites of King Edward II, were both executed by the orders of Roger Mortimer and Queen Isabella, who were by that time the de facto rulers of England; along with most of the people in the kingdom, they had resented the power both Despensers wielded over the King.

As her husband had been made Earl of Winchester in 1322, only after her death, Lady Despenser was never styled as the Countess of Winchester.