Lady Elizabeth De Burgh - Irish Biography

De Burgh, Lady Elizabeth, only child and heiress of preceding, born in 1332, married in 1352, Lionel, son of Edward III., who became in her right 4th Earl of Ulster and Lord of Connaught. Her daughter Philippa, wife of Edmund Mortimer, was ancestor of Edward IV. and subsequent British sovereigns. [See CLARENCE, DUKE OF.]

Sources

52. Burke, Sir Bernard: Dormant, Abeyant, Forfeited, and Extinct Peerages. London, 1866.