John of Gaunt
Descendants of this marriage included Henry Beaufort, Bishop of Winchester and eventually cardinal; Joan Beaufort, Countess of Westmorland, grandmother of Kings Edward IV and Richard III; John Beaufort, 1st Earl of Somerset, the great-grandfather of King Henry VII; and Joan Beaufort, Queen of Scots, from whom are descended, beginning in 1437, all subsequent sovereigns of Scotland, and successively, from 1603 on, the sovereigns of England, of Great Britain and Ireland, and of the United Kingdom to the present day. The three succeeding houses of English sovereigns from 1399 — the Houses of Lancaster, York and Tudor — were descended from John through Henry Bolingbroke, Joan Beaufort and John Beaufort, respectively.