 In recognition of his contribution to the work of the Court of Justice and to community law, he was created a Life Peer on 18 October 1988 as Baron Mackenzie-Stuart, "of Dean in the district of the City of Edinburgh" (his peerage, unlike his surname and Scottish judicial title, was hyphenated).His wife, the former Anne Burtholme Millar (died 2008), was known for her legendary parties, both in Edinburgh and Luxembourg.The Mackenzie Stuarts had four daughters, all of whom survived both their parents.