Joan Stewart - Wrong mother? Should be Margaret Graham not Muriella de Keith?

Marriage and family

Stewart's son, John Stewart, 2nd Earl of Buchan, in a late-18th-century engraving. Buchan was killed at the Battle of Verneuil in 1424.
Albany married twice. Firstly, in 1361, he married Margaret Graham, Countess of Menteith, (1334–1380) a wealthy divorcee who took him as her fourth husband. His sister-in-law's claim to the Earldoms of Menteith and Fife allowed him to assume those titles after marriage. The couple had eight children, seven daughters and a son:

Lady Janet Stewart (married Sir David de Moubray)
Lady Mary Stewart (married Sir William Abernathy, 6th of Saltoun)
Lady Margaret Stewart (married to Sir John Swinton, 14th of that Ilk)
Lady Joan Stewart (married Sir Robert Stewart, 1st Lord of Lorne and had descendants)
Lady Beatrice Stewart (married Sir James Douglas of Balveny)
Lady Isobel Stewart (married to Alexander Leslie, 7th Earl of Ross and later to Walter de Haliburton, 1st Lord Haliburton of Dirleton and had descendants)
Murdoch Stewart, Duke of Albany (1362–1425) (Married Joan Douglas and later to Isabel, Countess of Lennox).
Lady Margery (married Sir Duncan Campbell, 1st Lord Campbell and had descendants)
Margaret died in 1380 and Albany subsequently married Muriella Keith, with whom he had three children:

John Stewart, 2nd Earl of Buchan (1381–1424); he fought in France against the English during the Hundred Years War, serving with distinction, but was killed at the Battle of Verneuil on 17 August 1424.
Robert Stewart, Earl of Ross, died without issue
Lady Elizabeth Stewart (married to Malcolm Fleming, ancestor of Malcolm Fleming, 3rd Lord Fleming)

https://en.wikipedia.org/wiki/Robert_Stewart,_Duke_of_Albany

Thank you for the correction. I’ve locked her relationships.