Joan Beaufort, Countess of Westmorland (1379–1440), daughter of John of Gaunt and his mistress, Katherine Swynford, later proclaimed legitimate
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Anne Bigod (great-granddaughter of Robert Ferrers, 2nd Baron Ferrers of Wem and Joan Beaufort)
On 4 September 1439, Bishop Bullock appended his seal to the contract between Joan Beaufort, Queen Dowager, and Sir Alexander Livingston of Callendar, a contract that made Livingstone guardian of the boy king, James II of Scotland.
He had been an "intimate friend" of King Robert III of Scotland and his wife Anabella Drummond, and then James I and his wife Joan Beaufort.
Katherine Neville, Duchess of Norfolk (c.1397 – c.1483), eldest daughter of Ralph Neville and Joan Beaufort
Lady Joan Beaufort died in 1440, and eventually a settlement was reached in 1443 which, according to Pollard, represented a 'crushing defeat' for Neville, who regained the barony of Raby but was forced to concede the rest of the disputed lands to Salisbury.