Elizabeth, daughter of 1st Lord (Baron) le Despenser. [Burke's Peerage, p. 2098]
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Elizabeth (b. 10 or 11 April 1408), daughter of 1st Lord (Baron) le Despenser and widow of 2nd Lord (Baron) Arundel de jure (though he was never summoned to Parliament. [Burke's Peerage, p. 3102]
Note: I am sure that they mean "d. 10 or 11 April 1408".
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Elizabeth Despenser, d. 10 or 11 Apr 1408; m. (1) Sir John d'Arundel (121-8), Lord Arundel. [Magna Charta Sureties]
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Elizabeth, daughter of Edward, 1st Lord Despenser. She d. 10 or 11 Apr 1408. [Magna Charta Sureties]