DOUGLAS, Margaret ¹

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Margaret married Archibald CAMPBELL 8th Earl, then Marquess of Argyll, son of Archibald CAMPBELL 7th Earl of Argyll and Agnes DOUGLAS, about 7 August 1626.¹ (Archibald CAMPBELL 8th Earl, then Marquess of Argyll was born in 1607 in Inverary, Argyll, Scotland ¹ and died on 27 May 1661 in Edinburgh, Midlothian, Scotland ¹.). The cause of his death was beheading.

  Marriage Notes:

"The Marquess married, 6 or 7 August 1626, his cousin, Margaret Douglas, born 1610, second daughter of William, second Earl of Morton; she died 13 March 1678, leaving issue ..."

from Scots Peerage (vol 1)

Note
Margaret was not the daughter of the second Earl of Morton but of the seventh. This is probably simply a typographical error. Archibald's mother was Margaret's great-aunt. ¹