Cecilia de Dunbar

Lady Cecelia DE DUNBAR-MARCH married James (Seumas) STEWART 5th High Steward of the Scots, son of Alexander LE STEWARD 4th High Steward of Scotland and his wife before 1293 in Scotland 1970.

She was the daughter of Patrick III, 7th Earl of Dunbar[1] (c. 1213 – 24 August 1289) and (perhaps) his wife Cecile Fraser; Patrick had no issue by his 1st wife, Cecily fitz Robert.

(James (Seumas) STEWART 5th High Steward of the Scots was born about 1260 in Dundonald Castle, Irvine, Ayrshire, Scotland 1970 and died on 16 Jul 1309 in Dundonald Castle, Irvine, Ayrshire, Scotland 1970.)

This marriage is uncertain. No issue of this marriage.

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From https://en.wikipedia.org/wiki/Patrick_III,_Earl_of_Dunbar

Although some sources show Christiana de Brus as Patrick's wife and the mother of his children, other sources are in disagreement with this. According to The Scots Peerage, 'Cecilia filia Johannis' was his only recorded wife and mother of his sons, based on a charter by her eldest son.[15] The Complete Peerage shows 'Cecil, da. of John' as his wife and states that Christian Bruce was erroneously assigned as his wife in Wood's Douglas.[16]

supporting data

• page 356 of Magna Carta Ancestry: A Study in Colonial and Medieval Families, 2nd Edition, 2011 by Douglas Richardson. "Giles de Burgh, married (as his 3rd wife) James [Stewart] (or James fitz Alexander), Knt., 5th Stewart of Scotland, son and heir of Alexander Stewart, Knt., 4th Stewart of Scotland, of Dundonlad. They had four sons, Andrew, Walter, Knt. [6th Steward of Scotland], John, Knt., and James, Knt., [of Durrisdeer], and one daughter, Giles (wife of Alexander de Meyners or Menzies, Knt.). ...."
• "The Wives of Sir James the Steward (d.1309)" Author: MacEwen, Andrew B W Publisher: Foundation for Medieval Genealogy Year published: 2011 Status: See notes Description / Notes: "This paper rehabilitates the traditional year of Sir James the Steward’s birth, names his first two wives, explains the late date of his third marriage to Giles de Burgh, and provides information about their four known children. It posits a double marriage alliance between the Stewarts and Comyns about 1240, clarifies the date of birth of Robert II, and establishes the circumstances of his mother’s death in 1317. It incidentally brings forward some overlooked information on the Muschamp family and shows when Sir William, earl of Mar, actually died. Lastly it draws together what little is known concerning Sir Nicholas Campbell (d.1305), whose representation passed to the Lochawe branch."

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• https://en.wikipedia.org/wiki/Patrick_III,_Earl_of_Dunbar
• https://en.wikipedia.org/wiki/James_Stewart,_5th_High_Steward_of_Sc...
• Burke, Messrs., John and John Bernard, The Royal Families of England Scotland and Wales, with Their Descendants etc., London, 1851, volume 2, page xlvi.
• Cal.Doc Scot. vol ii, no 847. It appears more likely that the Earl of Ulster's daughter was his spouse given the name of his daughter