Lord Northesk married Jacqueline Dundas Reid in 1979. They had four children: • Alexander Robert Macrae Carnegie, Lord Rosehill (born 16 November 1980, committed
suicide 31 August 2001) • Lady Sarah Louise Mary Carnegie (born 29 October 1982) • Lady Fiona Jean Elizabeth Carnegie (born 24 March 1987) • Lady Sophie Margaret Jean Carnegie (born 9 January 1990) In 2001, his eldest child and only son Lord Rosehill, a psychiatric patient, shot himself in the head with his father's gun whilst on leave from hospital at the family's farm in
West Sussex. He was 20 years old. Northesk died at the age of 55 from cancer and was succeeded in the earldom by his eighth cousin once removed,
Patrick Carnegy. His vacated seat in the House of Lords triggered a
by-election for a Conservative hereditary peer to replace him. {{Emblem table ==Notes==