Sir Alexander Dunbar of Northfield, 5th Bt. (1742-1791) (1742–1791) Parents Archibald Dunbar of Newton, Thunderton and Duffus Helen Dunbar Children Sir Archibald Dunbar of Northfield, 6th Bt. Jean Dunbar John Dunbar Siblings William Dunbar Margaret Dunbar Thomas Dunbar Partners Margaret Arbuthnott