Marriages and children
Warwick first married Elizabeth de Berkeley (c. 1386 – 28 December 1422), before 5 October 1397, the daughter of Thomas de Berkeley, 5th Baron Berkeley and Margaret de Lisle, 3rd Baroness de Lisle. Together they had 3 daughters:
Lady Margaret de Beauchamp (1404–1467), who married John Talbot, 1st Earl of Shrewsbury, and whose great-great-grandson, John Dudley, was created Earl of Warwick and subsequently, Duke of Northumberland.
Lady Eleanor de Beauchamp (1408–1467), who first married Thomas de Ros, 8th Baron de Ros, and then married Edmund Beaufort, 2nd Duke of Somerset.
Lady Elizabeth de Beauchamp (1417–1480), who first married George Neville, 1st Baron Latimer, and then married Thomas VI Wake of Blisworth (1435–1476).
Warwick then married Lady Isabel le Despenser (26 July 1400 – 1439), the daughter of Thomas le Despenser, 1st Earl of Gloucester and Constance of York. With Isabel, who was also the widow of his first cousin, Richard de Beauchamp, 1st Earl of Worcester, his children were:
Henry de Beauchamp (1425–1446), who succeeded his father as Earl of Warwick, and later became Duke of Warwick.
Lady Anne de Beauchamp (1426–1492), who succeeded as the 16th Countess of Warwick in her own right, after the death of her niece. She married Richard Neville, 16th Earl of Warwick, famously known as the "Kingmaker".