The second son of George Mackay; he succeeded his cousin in 1797 and was a Scottish representative peer who voted with the Conservatives.

REFERENCES TO Eric Mackay, seventh baron Reay:

Thomas Creevey to Elizabeth Ord, 5 March 1827 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)