Donalbain is a character in William Shakespeare's Macbeth (c. 1603–1607). He is the younger son of King Duncan and brother to Malcolm, the heir to the throne. Donalbain flees to Ireland after the murder of his father for refuge. He is ultimately based on the historical King Donald III of Scotland.
In the original text of the First Folio his name is spelled Donalbaine, and is sometimes also spelled Donaldbain. His name is derived from the Scottish Gaelic Dòmhnall Bàn, "Donald the Fair."
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King Duncan is a fictional character in Shakespeare's Macbeth. He is the father of two youthful sons (Malcolm and Donalbain), and the victim of a well-plotted regicide in a power grab by his first cousin, and trusted captain, Macbeth. The origin of the character lies in a narrative of the historical Donnchad mac Crinain, King of Scots, in Raphael Holinshed's 1587 The Chronicles of England, Scotland, and Ireland, a history of Britain familiar to Shakespeare and his contemporaries. Unlike Holinshed's incompetent King Duncan (who is credited in the narrative with a "feeble and slothful administration"), Shakespeare's King Duncan is crafted as a sensitive, insightful, and generous father-figure whose murder grieves Scotland and is accounted the cause of turmoil in the natural world.
Malcolm is a character in William Shakespeare's Macbeth (c. 1603–1607). The character is based on the historical king Malcolm III of Scotland, and is derived largely from the account in Holinshed's Chronicles (1587), a history of Britain. He is the elder son of King Duncan, the heir to the throne, and brother to Donalbain. In the end, he regains the throne after mustering support to overthrow Macbeth.