Duncan is a common name that can refer to various individuals, places, or fictional characters. It is of Scottish origin, meaning "dark warrior." The name is often associated with historical figures, such as Duncan I of Scotland, a king who ruled in the 11th century and is famously depicted in William Shakespeare's play, Macbeth. In modern contexts, Duncan can also refer to various locations, such as Duncan, British Columbia, a city in Canada, or Duncan, Oklahoma, a city in the United States. Additionally, it may be used in popular culture, including movies, books, and television shows.