“Joan Beaufort (c. 1404 - 15 July 1445), was Queen Consort of the Kingdom of Scotland from 1424 to 1437, being married to James I of Scotland.

References
Ashley, Mike (2002). British Kings & Queens. Carroll & Graf. ISBN 0-7867-1104-3.  pages 461 & 486


She was a daughter of John Beaufort, 1st Earl of Somerset and Margaret Holland. Her paternal grandparents were John of Gaunt, Duke of Lancaster and his mistress and later third wife Katherine Swynford. Her maternal grandparents were Thomas Holland, 2nd Earl of Kent and Alice Fitzalan. Alice was a daughter of Richard FitzAlan, 10th Earl of Arundel and Eleanor of Lancaster.

On 2 February 1424 at Southwark Cathedral, Joan married James I, shortly before he was formally crowned. They were feasted at Winchester Palace that year by her uncle Henry Cardinal Beaufort. She is said to have been the inspiration of James's famous long poem, The Kingis Quair. They had eight children, including the future James II, and Margaret of Scotland, wife of Louis XI of France. After James I was assassinated in 1437, she took over the regency for her son.


[edit] Issue with James I of Scotland
Margaret Stewart, Princess of Scotland (1424-1445) married Louis XI of France
Isabella Stewart, Princess of Scotland (1426-1494) married Francis I, Duke of Brittany
Eleanor Stewart, Princess of Scotland (1433-1484) married Sigismund, Archduke of Austria
Mary of Scotland, Countess of Buchan died 1465 married Wolfart VI van Borsselen
Joan of Scotland, Countess of Morton (c. 1428-1486) married James Douglas, 1st Earl of Morton
James II of Scotland (1430-1460)
Alexander Stewart, Duke of Rothesay (born and died 1430); Twin of James
Annabella Stewart, Princess of Scotland married and divorced 1. Louis of Savoy, and then married and divorced 2. George Gordon, 2nd Earl of Huntly.

[edit] Second Marriage and Issue
In 1439 Joan married James Stewart, the Black Knight of Lorn (~1383 - >1451). They had three children:

John Stewart, 1st Earl of Atholl (c. 1440 - September 12, 1512).
James Stewart, 1st Earl of Buchan (1442-1499), High Chamberlain of Scotland in 1471 and Scottish Ambassador to France in 1473.
Andrew Stewart, Bishop of Moray
”