Casimir IV Jagiellon
Grand Duke of Lithuania from 1440, and King of Poland from 1447, until his death.
He was one of the most active Polish rulers, under whom Poland, by defeating the Teutonic Knights in the Thirteen Years' War recovered Pomerania, and the Jagiellonian dynasty became one of the leading royal houses in Europe. He was a strong opponent of aristocracy, and helped to strengthen the importance of Parliament and the Senate
Queen consort of England as the spouse of King Edward IV from 1464 until his death in 1483.
At the time of her birth, her family was mid-ranked in the English aristocracy. Her first marriage was to a minor supporter of the House of Lancaster, Sir John Grey of Groby; he died at the Second Battle of St Albans, leaving Elizabeth a widowed mother of two sons. Her second marriage, to Edward IV, was a cause célèbre of the day, thanks to Elizabeth's great beauty and lack of great estates. Edward was only the second King of England since the Norman Conquest to have married one of his subjects, and Elizabeth was the first such consort to be crowned queen. Her marriage greatly enriched her siblings and children, but their advancement incurred the hostility of Richard Neville, Earl of Warwick, 'The Kingmaker', and his various alliances with the most senior figures in the increasingly-divided royal family