CUNNINGHAM, William Earl of Glencairn, Sheriff of Ayr, Sir ^{1 2}

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William married Margaret DANIELSTON co-heiress, daughter of Sir Robert DANIELSTON of that Ilk and Unknown.¹ (Margaret DANIELSTON co-heiress was born about 1370 and died before July 1409 ¹.)

  Marriage Notes:

"Sir William married, first, Margaret, eldest of the two daughters and co-heiresses of Sir Robert Danielston of that Ilk. With her he obtained a large accession of property, comprehending the whole or half the baronies of Danielstown, and Finlaystown in Renfrew, Kilmarnock, Dumbartonshire, and Glencairn in Dumfriesshire. She died some time before July 1409 ...."

from Scots Peerage (vol 4) ¹

William next married Mary STEWART, daughter of John [ruled as Robert III] STEWART King of Scots and Annabella DRUMMOND Queen of Scots, July 1409(papal dispensation) and married 13 November 1413.^{1 2} (Mary STEWART was born about 1376, died about 1458 ^{3 4} and was buried in Strathblane, Stirlingshire, Scotland ^{3 4}.)

  Marriage Notes:

"She (Margaret Danielston) died some time before July 1409, when he (William Cunningham) had a Papal Dispensation to marry Marjory (Mary) Stewart, widow of James Kennedy, notwithstanding Margaret his first wife was related to Marjory in the second and third degrees. Mary Stewart was the second daughter of King Robert III., and was widow, first, of George Douglas, first Earl of Angus, and secondly, of James Kennedy, younger of Dunure, who was killed before 8 November 1408. There is no clear evidence that the marriage with Sir William Cunningham took place, though it is not improbable. Her third or fourth marriage with Sir William Grahame is first referred to on 15 May 1416, when he and she had a charter of certain lands."

from Scots Peerage (vol 4) ¹