Maximilian O'Dempsey, 3rd Viscount Clanmalier (died 1691) was an Irish

aristocrat The aristocracy (''from Greek'' ''ἀριστοκρατία'' ''aristokratía'', "rule of the best"; ''Latin: aristocratia'') is historically associated with a "hereditary" or a "ruling" social class. In many states, the aristocracy included the ...

. He was the son of Lewis O'Dempsey, 2nd Viscount Clanmalier and succeeded him in 1683. He was of mixed

Gaelic Gaelic (pronounced for Irish Gaelic and for Scots Gaelic) is an adjective that means "pertaining to the Gaels". It may refer to: Languages * Gaelic languages or Goidelic languages, a linguistic group that is one of the two branches of the Insul ...

and

Old English Old English ( or , or ), or Anglo-Saxon, is the earliest recorded form of the English language, spoken in England and southern and eastern Scotland in the Early Middle Ages. It developed from the languages brought to Great Britain by Anglo-S ...

descent. He was a

Roman Catholic The Catholic Church (), also known as the Roman Catholic Church, is the largest Christian church, with 1.27 to 1.41 billion baptized Catholics worldwide as of 2025. It is among the world's oldest and largest international institut ...

and a supporter of his fellow Catholic King James II during the

Williamite War in Ireland The Williamite War in Ireland took place from March 1689 to October 1691. Fought between Jacobitism, Jacobite supporters of James II of England, James II and those of his successor, William III of England, William III, it resulted in a Williamit ...

. He was appointed Governor of Queen's County by James and attended the

Irish House of Lords The Irish House of Lords was the upper house of the Parliament of Ireland that existed from medieval times until the end of 1800. It was also the final court of appeal of the Kingdom of Ireland. It was modelled on the House of Lords of Englan ...

in the

Patriot Parliament Patriot Parliament is the name commonly used for the Irish Parliament session called by King James II during the Williamite War in Ireland which lasted from 1688 to 1691. The first since 1666, it held only one session, which lasted from 7 May ...

of 1689.D'Alton p.108 He died in 1691. Although he had been married twice, to Anne Bermingham and Margaret FitzMaurice, he was childless and his position as Clan Chief was inherited by his younger brother, Terence O'Dempsey, who fled to

Cheshire Cheshire ( ) is a Ceremonial counties of England, ceremonial county in North West England. It is bordered by Merseyside to the north-west, Greater Manchester to the north-east, Derbyshire to the east, Staffordshire to the south-east, and Shrop ...

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

after the confiscation of the family estates carrying with him the original King Charles 1st Title document. This Terence was the ancestor of James Dempsey of Liverpool, a notable Georgian period merchant and ship owner and General sir

Miles Dempsey General Sir Miles Christopher Dempsey, (15 December 1896 – 5 June 1969) was a senior British Army officer who served in both world wars. During the Second World War he commanded the Second Army in northwest Europe. A highly professional car ...

, who commanded the British 2nd Army at D-Day during WW2.

References

Bibliography

* D'Alton, John. ''King James's Irish Army List''. The Celtic Bookshop, 1997 17th-century Irish nobility Year of birth unknown 1714 deaths People from County Laois Viscounts in the Peerage of Ireland Irish Jacobites Members of the Irish House of Lords {{Ireland-viscount-stub