Alasdair is a male given name of Scottish origin, derived from the Gaelic name Alasdair, which is a form of Alexander. The name means "defender of the people" and has been popular in Scotland for centuries. It is often associated with historical figures and Scottish nobility. In modern times, Alasdair is used in various cultures and can be found in different forms, such as Alistair or Aleksander. The name is commonly used in literature and media, often representing characters with strong, noble qualities.