Isabella Randolph

Isabel Randolph is the daughter of Thomas Randolph, 1st Earl of Moray and Isabella Stewart.2,1 She married Sir Patrick Dunbar, son of Sir Alexander Dunbar.1

Isabel Randolph is not the daughter of Black Agnes, nor is she the younger sister, although she is closely related. "Black Agnes" Randolph, Countess of Dunbar and March is Isabella Randolph's husband's uncle's wife.

Children of Isabel Randolph and Sir Patrick Dunbar

• John de Dunbar, 1st Earl of Moray+2 d. b 15 Feb 1392
• George Dunbar, 9th Earl of Dunbar+2 b. c 1336, d. bt 1416 - 1420

Citations

1. [S37] Charles Mosley, editor, Burke's Peerage, Baronetage & Knightage, 107th edition, 3 volumes (Wilmington, Delaware, U.S.A.: Burke's Peerage (Genealogical Books) Ltd, 2003), volume 1, page 1207. Hereinafter cited as Burke's Peerage and Baronetage, 107th edition.
2. [S37] Charles Mosley, Burke's Peerage and Baronetage, 107th edition.

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From page 687 of The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and General Information, Volume 17 Britannica Company, 1911 - Encyclopedias and dictionaries

Black Agnes [SIC] also bore to the Earl of March two daughters, the elder of whom, Agnes, after being the mistress of King David ll, married Sir James Douglas, Lord of Dalkeith, from whom were descended the first three Earls of Morton; Elizabeth, the younger daughter of Patrick Dunbar, married John Maitland of Lethington, ancestor of the Duke of Lauderdale, whose second title was Marquess of March.