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Marquess of Londonderry

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Title: Marquess of Londonderry  
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Subject: List of viscountcies in the peerages of Britain and Ireland, Dawdon, Mount Stewart, Earl of Londonderry, Courtesy titles in the United Kingdom
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Marquess of Londonderry

Robert Stewart, Viscount Castlereagh, British Foreign Secretary, who became the second Marquess of Londonderry in 1821

Marquess of Londonderry, of the County of Londonderry ( ),[1] is a title in the Peerage of Ireland.


  • History 1
  • Marquesses of Londonderry (1816) 2
  • Arms 3
  • See also 4
  • Notes 5
  • References 6


The title was created in 1816 for Robert Stewart, 1st Earl of Londonderry. He had earlier represented County Down in the Irish House of Commons. Stewart had already been created Baron Londonderry in 1789, Viscount Castlereagh, of Castlereagh in the County of Down,[2] in 1795 and Earl of Londonderry, of the County of Londonderry in 1796. These titles are also in the Peerage of Ireland.

He was the son of Alexander Stewart, who had married Mary Cowan, sister and heiress of Robert Cowan, who gained great wealth as Governor of Bombay from 1729 to 1737. Alexander was from Ballylawn, a townland at the south-west corner of Inishowen in the north of County Donegal, a county located in the west of Ulster in the northern part of Ireland. However, much of the Stewart family wealth was based on the estates which came into the family through this marriage.

The 1st Marquess was one of the few people to become a Marquess without inheriting any titles prior to the creation. He sat in the British House of Lords as one of the twenty-eight original Irish Representative Peers from 1800 to 1821. He was succeeded by his son from his first marriage to Lady Sarah Seymour. The 2nd Marquess, better known as Lord Castlereagh (he went by the courtesy title of Viscount Castlereagh from 1796 to 1821), was a noted statesman and diplomat. Castlereagh is best remembered for his tenure as Foreign Secretary of the United Kingdom from 1812 to 1822 and played an important role at the Congress of Vienna of 1814 to 1815. He committed suicide in 1822, one year after succeeding his father in the marquessate. The 2nd Marquess did not follow his father as a Representative Peer into the House of Lords, this permitted him to continue fulfilling his roles in the House of Commons.

Castlereagh was succeeded by his half-brother, the 3rd Marquess. He was the only son from the 1st Marquess's second marriage to Lady Frances Pratt, daughter of Charles Pratt, 1st Earl Camden. He was a General in the Army and like his elder half-brother a prominent politician and diplomat. Lord Londonderry served as Under-Secretary of State for War and the Colonies from 1807 to 1809, fought in the Napoleonic Wars and was Ambassador to Austria from 1814 to 1823. In 1814 he was created Baron Stewart, of Stewart's Court and Ballylawn in County Donegal, in the Peerage of the United Kingdom. In 1819 Londonderry married as his second wife Lady Frances Anne Vane-Tempest (died 1865), daughter and wealthy heiress of Sir Henry Vane-Tempest, 2nd Baronet, through which marriage substantial estates in County Durham came into the Stewart family. He assumed the additional surname of Vane on his marriage and in 1823 he was created Viscount Seaham, of Seaham in the County Palatine of Durham, and Earl Vane, with remainder to the male issue of his second marriage. These titles are in the Peerage of the United Kingdom.

Lord Londonderry was succeeded in the viscountcy of Seaham and earldom of Vane according to the special remainder by his eldest son from his second marriage while he was succeeded in the Irish titles and the barony of Stewart by his son from his first marriage to Lady Catherine Bligh, the 4th Marquess. He died childless in 1872 and was succeeded by his half-brother, the 5th Marquess, who had already succeeded his father as second Earl Vane in 1854. He represented Durham North in the House of Commons and served as Lord-Lieutenant of County Durham. In 1851 the 5th Marquess assumed by Royal license the additional surname of Tempest. On his death the titles passed to his eldest son, the 6th Marquess. He was a Conservative politician and held office in the administrations of Lord Salisbury and Arthur Balfour as Lord-Lieutenant of Ireland, as Postmaster General, as President of the Board of Education, as Lord Privy Seal and as Lord President of the Council. In 1885 he assumed by Royal license the additional and principal surname of Stewart.

He was succeeded by his son, the 7th Marquess, who was also a Conservative politician. He had a career in both Irish and British politics but is best known for his role as Secretary of State for Air from 1931 to 1935. Lord Londonderry subsequently gained notoriety for his informal diplomatic contacts with senior members of the German government. He made six visits to Nazi Germany between January 1936 and September 1938 meeting Adolf Hitler on a number of occasions and sympathising with some of his viewpoints.[3] His wife Edith Vane-Tempest-Stewart, Marchioness of Londonderry, was an influential society hostess remembered for her close friendship with Ramsay Macdonald. Lord Londonderry was succeeded by his son, the 8th Marquess. He represented County Down in the House of Commons as a Conservative from 1931 to 1945. As of 2014 the titles were held by his grandson, the 10th Marquess, who succeeded in 2012.

The heir apparent to the marquessate is styled Viscount Castlereagh, although the Marquess is also the Earl Vane, and the heir apparent's heir apparent (when such exists), in one of only two exceptions (the other being Duke of Manchester) to the 'rule' that the heirs of Viscounts do not use courtesy titles, is styled Lord Stewart.

Between 1823 and 1854 and between 1872 and 1999, the Marquesses of Londonderry sat in the House of Lords as The Earl Vane. Between 1822 and 1823 and between 1854 and 1872, they sat as The Lord Stewart.

The family seat was Mount Stewart, near Newtownards, County Down, Northern Ireland. The other estates were, the Wynyard Park estate in County Durham, Seaham Hall in County Durham as well as Londonderry House on Park Lane in London (where the Hilton London Hotel is now) and Plas Machynlleth in mid-Wales.

Marquesses of Londonderry (1816)

The heir presumptive is his brother Lord Reginald Alexander Vane-Tempest-Stewart (born 1977).
The heir presumptive's heir apparent is his son Robin Gabriel Vane-Tempest-Stewart (born 2004).


Arms of Marquess of Londonderry
Coronet of a Marquess
Dexter: A Griffin’s Head erased per pale Argent and Sable, beaked Gules (Tempest); Centre: A Dragon statant Or (Stewart); Sinister: A dexter Cubit Arm in Armour, the hand in a Gauntlet proper, grasping a Sword proper, pommelled and hilted Or (Vane).
Quarterly: 1st & 4th, Or, a Bend counter-company Argent and Azure, between two Lions rampant Gules (Stewart); 2nd, Argent, a Bend engrailed between six Martlets Sable (Tempest); 3rd, Azure, three sinister Gauntlets Or (Vane).
Dexter: A Moor wreathed about the temples Argent and Azure, holding in the exterior hand a Shield Azure, garnished Or, and charged with a Sun in Splendour Gold; Sinister: A Lion Or, gorged with a Collar Argent, charged with three Mullets Sable.
METUENDA COROLLA DRACONIS (The dragon’s crest is to be feared)

See also


  1. ^  
  2. ^ "Castlereagh". The Parliamentary gazetteer of Ireland. I: A-C. Dublin: A. Fullarton. 1846. p. 372. 
  3. ^ Fleming, Neil C. (2005), The Marquess of Londonderry: aristocracy, power and politics in Britain and Ireland, I.B.Tauris, pp. 185–198,  
  4. ^ "The Marquess of Londonderry", Daily Telegraph, 20 June 2012. Retrieved 6 October 2012.


  • Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990,
  • Leigh Rayment's Peerage Pages
  • Lundy, Darryl. "FAQ". The Peerage. 
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