Note 2 — INTRODUCTION. The Plantagenets.

"Lionel of Clarence married Elizabeth, daughter of William de Burgh, Earl of Ulster, and had a daughter, Philippa, wife of Edmund Mortimer, Earl of March. John of Gaunt was thrice married. His first wife was Blanche, heiress of Lancaster, by whom he had a son, Henry the Fourth, and two daughters—Philippa, married to the King of Portugal, and Elizabeth, to John Holland, Duke of Exeter. His second wife was Constance, eldest daughter of Peter the Cruel, King of Castile, by whom he had a daughter, Katherine, married to Henry the Third, King of Castile. His third wife was Katherine Swynford, by whom he had two sons—Henry Beaufort, Cardinal of St. Eusebius and Bishop of Winchester, and John Beaufort, Earl of Somerset, ancestor of the dukes who fought in the Wars of the Roses, and of Margaret Beaufort, Countess of Richmond, mother of Henry the Seventh. But both the sons of Katherine Swynford were born before wedlock. Edmund of Langley espoused Isabel, second daughter of Peter the Cruel, and had two sons—Edward, Duke of York, who fell at Agincourt, and Richard, Earl of Cambridge, who married Anne Mortimer, daughter of the Earl of March, and left a son, Richard, Duke of York."—See Sandford's Genealogical History.