Mary Stewart, Countess of Buchan (1434 or 1435 – 20 March 1465) was the fifth daughter of James I of Scotland and Lady Joan Beaufort.
[1] Her sister Margaret became the dauphine of France, but died childless at age 20, apparently of fever.
In 1444, Princess Mary married Wolfert VI van Borselen[3] in Veere, Zeeland, Netherlands.
[4] In 1464, her husband was a Marshal of France, and he was later created Wolfart VI, Lord of Veere and Count of Grandpre.
[citation needed] After her death, her husband married Charlotte de Bourbon, daughter of Louis I, Count of Montpensier.