Sir Iain Moncreiffe Bt CVO QC FSA Scot
Bust of Moncreiffe in the Register House, Edinburgh
Born	9 April 1919
Died	27 February 1985 (1985-02-28) (aged 65)
Occupation	Officer of Arms, genealogist
Nationality	British
Alma mater	University of Edinburgh Christ Church, Oxford
Subject	Genealogy, heraldry
Notable works	Simple Heraldry (1953) Blood Royal (1956) The Highland Clans (1967)
Spouse	Diana Hay, 23rd Countess of Erroll ​ ​ (m. 1946⁠–⁠1964)​ Hermione Patricia Faulkner ​ ​ (m. 1966⁠–⁠1985)​
Children	Merlin Hay, 24th Earl of Erroll Peregrine Moncreiffe of that Ilk Lady Alexandra Moncreiffe Hay

Sir Rupert Iain Kay Moncreiffe of that Ilk, 11th Baronet,CVO, QC, FSA Scot (9 April 1919 – 27 February 1985), Chief ofClan Moncreiffe, was a BritishOfficer of Arms, historian andgenealogist.^[a]

Moncreiffe was the son of Lieutenant-Commander Gerald Moncreiffe,RN, and Hilda, daughter of the Comte de Miremont.^[1] He succeeded his cousin as 11thBaronet and Chief ofClan Moncreiffe in 1957.^[2]

Educated atStowe School,Heidelberg, andChrist Church, Oxford, as a cadet officer Moncreiffe trained withDerek Bond (actor) andPatrick Leigh Fermor,^[3] he later served inScots Guards during theSecond World War, then as attaché at the British embassy in Moscow, before studyingScots Law at theUniversity of Edinburgh. He was awarded a PhD (1958) with a thesis on the Origins and Background of the Law of Succession to Arms and Dignities in Scotland,^[4] which was published as a monograph in 2010.^[5]

A prominent member of theLyon Court, Moncreiffe held the offices ofFalkland Pursuivant (1952),Kintyre Pursuivant (1953),Unicorn Pursuivant (1955), and (from 1961)Albany Herald. He wrote a popular work about the Scottish clans,The Highland Clans (1967), and withDon PottingerSimple Heraldry, Cheerfully Illustrated (1953),Simple Custom (1954), andBlood Royal (1956), but his interests also extended to Georgian and Byzantine noble genealogies.Lord of the Dance, A Moncreiffe Miscellany, edited byHugh Montgomery-Massingberd encompassed his genealogical world-view.^[6]

He was elected a Fellow of theAmerican Society of Genealogists in 1969.^[7]

He was an incorrigible snob; he even called himself Master Snob.^[8] Hetook silk (relatively late in his career) because very few barristers specialised in heraldic matters and he wished to highlight the importance of this field of speciality. He was a frequent writer of amusing and often illuminating letters to newspapers, particularlyThe Daily Telegraph, and provided the introduction toDouglas Sutherland's satirical bookThe English Gentleman (1978). He held membership in many London clubs and founded his own club inEdinburgh, calledPuffin's Club, – the name was taken from the nickname of Sir Iain's first wife, 'Puffin',Diana Hay, 23rd Countess of Erroll. It was and continues to be a weekly luncheon club, which between the early 1960s and late 1990s met in Martin's restaurant in Rose Street Lane North, Edinburgh. It still meets monthly in London and Edinburgh. The membership was and is as varied and eccentric as its founder. Ex-KingZog I, King of Albania paid his founding subscription of £5 in 1961, but died before he could attend. The actorTerence Stamp,Sir Nicholas Fairbairn,Sir Fitzroy Maclean andLord Dacre all attended with varying frequency.^[9] It was said that at some point half thecrowned heads of Europe were on the list.^[10]

Moncreiffe married twice. FirstlyDiana Hay, 23rd Countess of Erroll, whom he married on 19 December 1946 atSt Margaret's, Westminster. They had three children:

• Merlin Sereld Victor Gilbert Hay, 24th Earl of Erroll, Chief ofClan Hay (b. 20 April 1948).
• Hon. Peregrine David Euan Malcolm Moncreiffe of that Ilk, Chief ofClan Moncreiffe (b. 16 February 1951), married in 1988 Miranda Mary Fox-Pitt (b. 29 December 1968).
• Lady Alexandra Victoria Caroline Anne Moncreiffe Hay (b. 30 July 1955), marriedJolyon Connell (b. 16 May 1952); they have two daughters, Flora Diana Catharine Cecelia Connell (b. 24 February 1990) and Ciara Edith Elisabeth Connell (b. 28 March 1994). Lady Alexandra also has a son, Ivar Francis Grey de Miremont Wigan.

Moncreiffe's first marriage was dissolved in 1964 and in 1966 he took as his second wife Hermione Patricia Faulkner, daughter of Lieutenant-Colonel Walter Douglas Faulkner andPatricia Katherine Montagu Douglas Scott.^[11]

• Bond, Derek (1990),Steady, Old Man! Don't You Know There's a War On?, London: Leo Cooper, p. 19,ISBN 0-85052-046-0
• Powell, Anthony (1990),Miscellaneous Verdicts: writings on writers, 1946-1989, Heinemann, p. 51,ISBN 9780434599288

• "Sir Iain Moncreiffe, baronet Moncreiffe",Geneall.net]

Baronetage of Nova Scotia
Preceded by David Moncreiffe	Baronet (of Moncreiffe) 1957–1985	Succeeded by Merlin Hay
Heraldic offices
Preceded by John William Balfour Paul	Falkland Pursuivant 1952–1953	Succeeded by Don Pottinger
Preceded by Hugh Gray Tibbetts	Kintyre Pursuivant 1953–1955	Succeeded by Charles Jauncey
Preceded by Gordon Dalyell of the Binns	Unicorn Pursuivant 1955–1961	Succeeded by Don Pottinger
Preceded by Charles Ian Fraser	Albany Herald 1961 – bef. 1985	Succeeded by John Spens

• 1919 births
• 1985 deaths
• Nobility from Perth and Kinross
• Baronets in the Baronetage of Nova Scotia
• People educated at Stowe School
• Commanders of the Royal Victorian Order
• 20th-century King's Counsel
• Scottish officers of arms
• Scottish genealogists
• Fellows of the American Society of Genealogists
• Scottish King's Counsel
• Scots Guards officers
• British Army personnel of World War II
• Alumni of Christ Church, Oxford
• Alumni of the University of Edinburgh
• 20th-century British historians
• 20th-century British lawyers

• CS1 maint: archived copy as title
• Articles with short description
• Short description matches Wikidata
• EngvarB from August 2014
• Use dmy dates from August 2014