a Scottish general best known for his service in the Revolution of 1688. He entered Douglas's (Dumbarton's) regiment of the English army (now the Royal Scots) in 1660 and accompanied it to France when it was lent by Charles II to Louis XIV. After the Restoration, in 1660, he became ensign in Douglas's or Dumbarton's regiment, subsequently the royal Scots, and when the regiment was lent by Charles II to the French king, Mackay accompanied it to France.
