Mormaer Macbeth was a Scottish nobleman who lived during the 11th century. He held the title of Mormaer of Moray, a region in northern Scotland. Macbeth is often remembered for his role in the historical events leading up to his reign as king, which was marked by conflict and ambition. In 1040, Macbeth became the king of Scotland after defeating King Duncan I in battle. His rule lasted until 1057, when he was ultimately killed by Malcolm Canmore, Duncan's son. Macbeth's life and reign have been popularized in literature, most notably in William Shakespeare's play "Macbeth."