Duncan 4th Earl de Mar 
Duncan 4th Earl de was born about 1160 in Mar, Aberdeenshire, Scotland. Duncan 4th Earl de's father was Morgund MacGylocher 2nd Earl de Mar and his mother was Agnes. His paternal grandfather was Gillocher 1st Earl de Mar. He had a brother named Gilchrist 3rd Earl de. He was the younger of the two children. He died in Mar, Aberdeenshire, Scotland.General Notes
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]
He had a biological son and a biological daughter, named William 5th Earl de and Margaret of.
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Children
Margaret of Mar
Margaret of was born in 1220 in Mar, Aberdeenshire, Scotland. Margaret of is no longer alive.
William 5th Earl de Mar , Sir
William 5th Earl de was born in 1222 in Mar, Aberdeenshire, Scotland. He died before July 25th, 1281 in Kildrummy Castle, Aberdeenshire, Scotland.
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