Thomas of Lancaster, Duke of Clarence was a medieval English prince and soldier, the second son of Henry IV of England, brother of Henry V, and heir to the throne in the event of his brother's death.
The Battle of Baugé, from Les Vigiles de Charles VII
Thomas Beaufort, Duke of Exeter was an English military commander during the Hundred Years' War, and briefly Chancellor of England. He was the third of the four children born to John of Gaunt, Duke of
Stained glass in Salle, Norfolk with arms of Duke of Exeter (right), next to that of William "Jackanapes" de la Pole, Duke of Suffolk.