Elizabeth de Berkeley, Countess of Warwick and Baroness Lisle (1386 – 28 December 1422), was an English noblewoman and heiress.With her father's death in 1417, Elizabeth and her husband Richard de Beauchamp, 13th Earl of Warwick, became involved in an inheritance dispute with her cousin James Berkeley, initiating one of the longest lawsuits in English history.Margaret died near 1392, but Elizabeth did not succeed to them until the death of Thomas in 1417, as he held the lands by tenure of courtesy.[1][3] Elizabeth and her husband refused to accept the entail, thus "initiat[ing] one of the longest lawsuits in England", which lasted until 1609.[1] After Lord Thomas' death, the Earl and Countess of Warwick quickly took control of the castle and gained the temporary permission of King Henry V to maintain it.