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John Montagu, Marquess of Monthermer

politician

Correspondence, annotated notebooks and portrait silhouettes prepared for research
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Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionMay 4, 2026
Entity authorityQ6249179 ↗
Source-derived summary

John Montagu, Marquess of Monthermer, 1st Baron Montagu of Boughton (18 March 1735 – 11 April 1770) was a British peer.

Life

He was born John Brudenell, the eldest son of George Brudenell, 4th Earl of Cardigan, by his wife Mary, daughter of John Montagu, 2nd Duke of Montagu. As heir-apparent to the Earldom of Cardigan, he was styled Lord Brudenell from birth. He was educated at Eton College, which he entered in 1748.

In 1749 the Duke of Montagu died, and his son-in-law Lord Cardigan inherited his estates. He and his children duly adopted the surname Montagu in lieu of that of Brudenell. One of the Montagu family titles was revived in the person of Lord Brudenell when he was created Baron Montagu of Boughton, of Boughton in the county of Northampton, on 8 May 1762. The Earl of Cardigan was created first Duke of Montagu of the second creation on 5 November 1766, and his son assumed the courtesy title Marquess of Monthermer.

Prior to his elevation to the peerage, Lord Brudenell was briefly a Tory Member of Parliament for Marlborough, sitting for the borough along with his uncle Colonel Robert Brudenell. In 1764 his portrait was painted by Pompeo Batoni.

Editorial summary

This brief starts where responsible research should: with the source description of “John Montagu, Marquess of Monthermer” as politician. Everything that follows is an evidence route, not borrowed authority.

Editorial reviewStrongest as a route into the people, institutions and dated events that shaped the subject’s public record. The current lead gives the account dated anchors—1735, 1770, 1748, 1749—that can be checked directly. The selected authority fields contribute no independent date. The account is most persuasive where John, Montagu and Marquess can be independently traced.
Editorial analysis

Why this record matters

The subject matters to the people & ideas register because the source frames it as politician. Its deeper value depends on whether names, dates, institutions and citations support that framing.

Evidence profile

The entry’s evidential value lies in the named roles, institutions and publications that can be tested against primary documentation. The source revision retrieved here is dated May 4, 2026. The linked authority identifier is Q6249179. The first chronological checks are 1735, 1770, 1748 and 1749.

Critical limits

Public reputation and documentary evidence do not always develop together; absence from a summary is not evidence of historical absence. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Read biographical claims against dates, named institutions and the cited references. Distinguish a subject’s later reputation from evidence produced during their lifetime.

Best used for
  • Establishing names and roles
  • Building a first chronology
  • Locating cited institutions
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Personal papers, civil or court records, institutional files and the scholarship cited by the source.

Three-step research path

  1. Establish the record: confirm the title “John Montagu, Marquess of Monthermer”, its source revision and the description used here.
  2. Expand the search: follow John Montagu, Marquess of Monthermer primary sources, John Montagu, Marquess of Monthermer archive and John research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

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Source & attribution

This entry incorporates text from “John Montagu, Marquess of Monthermer” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.