Princess Margaret Stewart of Scotland

Margaret Stewart
Issue	Margaret Crichton Sir James Crichton?
House	House of Stewart
Father	James II of Scotland
Mother	Mary of Guelders

Margaret Stewart (born c. 1455, date of death unknown) was the younger daughter of James II of Scotland and Mary of Guelders. Once engaged to the Lancastrian Prince of Wales, Margaret instead became the mistress of William Crichton, 3rd Lord Crichton (an enemy of her brother, James III), and the mother of his illegitimate daughter, Margaret Crichton, later Countess of Rothes, and possibly his son, Sir James Crichton, progenitor of the Viscounts of Frendraught. Margaret and Lord Crichton may have been married later, after the death of Crichton's wife.

Margaret was born between 1453 and 1460 in Scotland, the daughter of James II of Scotland and Mary of Guelders. She had five siblings, including James III, who ascended the Scottish throne in 1460 upon their father's accidental death by an exploding cannon. Margaret's mother died in 1463, leaving her an orphan at probably less than ten years old.

During the Wars of the Roses, Margaret's elder sister Mary was briefly engaged to Edward of Westminster, Prince of Wales, the only son of Henry VI of England and Margaret of Anjou. However, the engagement was called off by her mother due to political pressure from Edward IV of England and Philip III, Duke of Burgundy. Mary was later married to a Scot, but thoughts of an English match did not go away, and Margaret's brother James III was particularly keen to achieve one. In 1476, she was therefore proposed by James III to George Plantagenet, 1st Duke of Clarence, and she was afterward to have been married to Anthony Woodville, 2nd Earl Rivers, brother-in-law of Edward IV; but neither of these alliances took place.

...
Wikipedia