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(died Aug. 1, 1040, near Elgin, Moray, Scot.) King of the Scots (1034–40). The grandson of King Malcolm II, his accession to the throne violated the system in which kingship alternated between two branches of the royal family. He was challenged by Macbeth, mormaer (subking) of Moray, who was the inspiration for the play by William Shakespeare and who may have had a stronger claim to the throne. Macbeth murdered Duncan in 1040, and Duncan's elder son later killed Macbeth and ruled as Malcolm III Canmore.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Duncan I, visit Britannica.com.
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