She married her first husband, Vice Admiral Sir Samuel Hood, 1st Baronet of the Royal Navy on 6 November 1804 at Saint Michael, Barbados.

[1] She married James Alexander Stewart of Glasserton, the son of Vice Admiral The Hon.

Her husband served as a Member of Parliament for Ross-shire and Ross and Cromarty before becoming the 7th Governor of British Ceylon.

[6] Mackenzie was the subject of a portrait by Sir Thomas Lawrence and a prophecy attributed to the Brahan Seer.

Mackenzie was Walter Scott's prototype for Ellen Douglas in his narrative poem "The Lady of the Lake".