Anglesey
Island county in Wales

Anglesey, or Ynys Môn, is an island off the north-west coast of Wales. It forms the majority of the county of the Isle of Anglesey, which also includes Holy Island to the west and some islets and skerries. The county borders Gwynedd across the Menai Strait to the south-east and is otherwise surrounded by the Irish Sea. Holyhead is the largest town, and the administrative centre is Llangefni.
“Anglesey” enters the record as island county in Wales. Crown Archives preserves that source wording while asking what Anglesey, Island and county can confirm, complicate or overturn.
Why this record matters
“Anglesey” is worth following because a concise public description often conceals a longer documentary argument. Here, Anglesey, Island and county provides the most credible route into that argument.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Aug 29, 2026.
A single description cannot reconcile every naming convention, rebuilding phase or administrative transfer associated with a place. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Anglesey”, its source revision and the description used here.
- Expand the search: follow Anglesey primary sources, Anglesey archive and Anglesey 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 “Anglesey”?
- Which earlier names or jurisdictions may reveal additional records?
- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “Anglesey” 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.