Lieutenant-Colonel John Keiller MacKay OC DSO VD QC (July 11, 1888 – June 12, 1970) was a Canadian soldier, lawyer and jurist. MacKay served as the 19th lieutenant governor of Ontario from 1957 to 1963.
Lieutenant-Colonel John Keiller MacKay OC DSO VD QC (July 11, 1888 – June 12, 1970) was a Canadian soldier, lawyer and jurist. MacKay served as the 19th lieutenant governor of Ontario from 1957 to 1963. (en)