Macbeth of Scotland or Mac Bethad mac Findlaích (Modern Gaelic: MacBheatha mac Fhionnlaigh), anglicised as Macbeth, and nicknamed Rí Deircc, "the Red King" (died 15 August 1057), was King of Scots (or Alba) from 1040 until his death. He is best known as the subject of William Shakespeare's tragedy Macbeth and the many works it has inspired, although the play is historically inaccurate.
Macbeth's life, like that of King Duncan I, had progressed far towards legend by the end of the 14th century, when John of Fordun and Andrew of Wyntoun wrote their histories. Hector Boece, Walter Bower, and George Buchanan all contributed to the legend.
The influence of William Shakespeare's Macbeth towers over mere histories, and has made the name of Macbeth infamous. Even his wife has gained some fame along the way, lending her Shakespeare-given title to a short story by Nikolai Leskov and the opera by Dmitri Shostakovich entitled Lady Macbeth of Mtsensk. The historical content of Shakespeare's play is drawn from Raphael Holinshed's Chronicles of England, Scotland, and Ireland, which in turn borrows from Boece's 1527 Scotorum Historiae which flattered the antecedents of Boece's patron, King James V of Scotland.