Mackay is a surname of Scottish origin, derived from the Gaelic name Mac Aoidh which means "son of Aodh" or "son of fire." It is a common surname in Scotland and has spread to other English-speaking countries around the world. The name is often associated with strength, courage, and leadership qualities. Famous individuals with the surname Mackay include politicians, athletes, and musicians. Overall, Mackay is a distinguished and respected name with a rich history and heritage.