Duncan of Mar, 4th Earl of Mar

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http://en.wikipedia.org/wiki/Donnchadh%2C_Earl_of_Mar

Duncan, 4th Earl of Mar [3rd Earl was elder brother Gilchrist], which dignity he held by 29 Aug 1228, though his right to it was challenged at some point prior to 1231; witness to the Anglo Scottish agreement sealed autumn 1237. [Burke's Peerage]
From Wikipedia, the free encyclopedia
Donnchadh
Earl of Mar
In office
1203–1244
Donnchadh of Mar (Anglicized as Duncan) is the fifth known Mormaer of Mar, 1203–1244.

Donnchadh was the son of Morggán and Agnes. Donnchadh benefited from the introduction of feudal primogeniture as a custom, as it enabled him and his kin to exclude the descendants of Gille Críst, whose contemporary leader was Thomas de Lundin, from the succession. Perhaps in gratitude, he named his oldest son William after King William I, the probable source of the innovation in Mar's inheritance custom. He married Orabillis of Nessius, by whom he fathered William, and died in 1244.

Bibliography
Anderson, Alan Orr, Early Sources of Scottish History: AD 500-1286, 2 Vols (Edinburgh, 1922), p. 493, n. 1
Oram, Richard D., "The Earls and Earldom of Mar, c1150-1300," Steve Boardman and Alasdair Ross (eds.) The Exercise of Power in Medieval Scotland, c.1200-1500, (Dublin/Portland, 2003), pp. 46–66Biography

Donnchadh (Mar) of Mar is a member of Clan Mar.
Name
Duncan of Mar, 4th Earl of Mar [1]
Dhonnchaidh mac Morggán, 4th Earl of Mar [1]
Donnchadh of Mar, (Anglicized as Duncan), is the fifth known Mormaer of Mar, 1203-1244. [1]
1158 Birth
He was born circa 1158 in Mar, Aberdeenshire, Scotland.[1]

Parents
He was the son of Morggán mac Gylocher, 2nd Earl of Mar and Agnes d'Harcourt [1]

Siblings
Cawley [2] shows Morgund with three children by his first wife:

Malcolm, named by FMG [2] and also by Scots Peerage. [3]
Duncan, named by FMG [2] and also by Scots Peerage. [3]
James, named by FMG [2] and also by Scots Peerage. [3]
Sir James Balfour Paul in The Scots Peerage, names additional children of Morgund: [3]

Donald, named by Scots Peerage. [3]
David, named by Scots Peerage. [3]
John, named by Scots Peerage. [3]
Uncertain children:

Gilchrist, Earl de Mar was the next Earl of Mar after Morgund and may have been his son. ref name="jbp"/> Cawley shows Gilchrist as the next Earl of Mar, but without showing a relationship with Morgund. [2]
Marriage
He was the husband of Agnes, Countess of de Mar and Orabella Latherisk[1]

Feudal Primogeniture
Donnchadh benefited from the introduction of feudal primogeniture as a custom, as it enabled him and his kin to exclude the descendants of Gille Críst, whose contemporary leader was Thomas de Lundin, from the succession. Perhaps in gratitude, he named his oldest son William after King Willian I, the probable source of the innovation in Mar's inheritance custom. [4]

He married Orabillis of Nessius, by whom he fathered William, and died in 1244. [4]

Earl of Mar
Duncan, 4th Earl of Mar [3rd Earl was elder brother Gilchrist], which dignity he held by 29 Aug 1228, though his right to it was challenged at some point prior to 1231; witness to the Anglo Scottish agreement sealed autumn 1237. [5]

1244 Death
He died before February 07, 1244 in Mar, Aberdeenshire, Scotland. He was buried in the Cathedral Church of St Machar in Aberdeen[1]

Issue
He was the father of

Margaret of Mar [1] (Margaret de Mar)
William de Mar, 5th Earl of Mar [1] (Uilleim mac Dhonnchad), 5th Earl of Mar
Sources

Geni Duncan 4th Earl of Mar Added by: Andrew Porter Glendinning on July 8, 2007; Managed by: Henrik Nissen Sætness and 56 others; Curated by: Ben M. Angel; Accessed October 22, 2018 jhd

Charles Cawley. Foundation for Medieval Genealogy. Medieval Lands Database. Scottish Nobility Morgund's Children Accessed October 22, 2018 jhd
Sir James Balfour Paul, ed., The Scots Peerage, 1908 Vol 5 page 568 Accessed Oct 22, 2018 jhd
↑ 4.0 4.1 http://en.wikipedia.org/wiki/Donnchadh%2C_Earl_of_Mar
↑ Burke's Peerage
See also:

Roberts, John L., Lost Kingdoms: Celtic Scotland in the Middle Ages, (Edinburgh, 1997), pp. 55–6