Baron Mansel
barony in the Peerage of Great Britain
Baron Mansel, of Margam in the County of Glamorgan, was a title in the Peerage of Great Britain. It was created on 1 January 1712 for Sir Thomas Mansel, 5th Baronet, previously Member of Parliament for Cardiff and Glamorganshire. His ancestor had been created a Baronet, of Margam in the County of Glamorgan, in the Baronetage of England on 22 May 1611. The fourth Baronet represented Glamorgan in the House of Commons. The fourth Baron sat as Member of Parliament for Cardiff. On his death 29 November 1750 the barony and baronetcy became extinct.
On the death of the 4th baron, the Margam estates passed to his daughter Louisa, who married George Venables-Vernon, subsequently 2nd Baron Vernon. Following her death without issue in 1786, it passed to her aunt Mary Mansell, who had married John Ivory Talbot of Lacock Abbey, Wiltshire. However, other parts of the estates (subsequently known as the Briton Ferry estate) passed to her uncle Thomas Earl of Clarendon then to William Henry Augustus Villiers (who took the surname Mansell to inherit this estate). On his death without issue, it passed to his elder brother's son George Child Villiers, 5th Earl of Jersey.
Begin with the source’s own compact description: “Baron Mansel” is barony in the Peerage of Great Britain. The dossier treats that line as a proposition to test through Baron, Mansel and barony, not as a finished interpretation.
Why this record matters
The phrase “barony in the Peerage of Great Britain” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jan 14, 2026. The linked authority identifier is Q4862603. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1712, 1611, 1750 and 1786.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. 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
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Baron Mansel”, its source revision and the description used here.
- Expand the search: follow Baron Mansel primary sources, Baron Mansel archive and Baron research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Baron Mansel”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Baron Mansel” 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.