Thomas of Mar was a 14th century
Mormaer (
Earl) of
Mar (c.1330–1377)‘Thomas, ninth earl of Mar (c. 1330–1377)’ in Fiona Watson, 'Donald, eighth earl of Mar (1293–1332)',
Oxford Dictionary of National Biography, Oxford University Press, 2004.. He was a son of
Domhnall II of Mar.
Thomas became Earl of Mar whilst still a child living in the
Kingdom of England, and it took several years for Thomas to return to the
Kingdom of Scotland and take charge of his inheritance. He had a fairly successful career in Scottish politics, becoming
Great Chamberlain of Scotland, and several times acting as an ambassador to England.
He married twice, firstly Margaret Graham of
Menteith, and secondly
Margaret Stewart,
Countess of Angus. He was succeeded by his sister Margaret, who was married to
William Douglas, 1st Earl of Douglas. He died childless in 1377, bringing his line and the ancient
Gaelic earldom of Mar through the male line to an end. The earldom passed into the Douglas family.
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