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 who married sometime between 1261 and 1268; two sisters who were