*SET-U

English word origin

Etymology of Derry

From Irish Doire, from doire (“oak grove”), from Old Irish daire (“oak forest”), from Proto-Celtic *daru.

1 source sectionExtended source reportWiktionary original ↗
In this entry · 1 source sections

The source etymologies

Wiktionary via Kaikki / Wiktextract

The source reports below are imported and unreviewed by *SET-U. Separate numbered origins and differing source variants are preserved; agreement within this extraction is not independent corroboration.

Unnumbered source etymology

Original entry ↗
name

A city in northwestern Northern Ireland; also known as Londonderry. · One of the traditional counties in northwestern Northern Ireland; known as County Derry, or officially as County Londonderry. · A town in Rockingham County, New Hampshire, United States. · A borough and township in Westmoreland County, Pennsylvania, United States.

Selected source glosses provide context, not a complete modern definition inventory

From Irish Doire, from doire (“oak grove”), from Old Irish daire (“oak forest”), from Proto-Celtic *daru.

Relationships mentioned by the source

These are extracted mentions, not a timeline or a verified sequence of immediate parents.

  • Derivation mentionDoirega
  • Derivation mentiondairesga
  • Derivation mention*darucel-pro

This page abbreviates 3 auxiliary source items. The etymology narrative is not shortened. Omission counts are available in the audit fields below; consult the original for complete auxiliary material.

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

{
  "templates": [
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "ga",
        "3": "Doire"
      },
      "expansion": "Irish Doire"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "sga",
        "3": "daire",
        "4": "",
        "5": "oak forest"
      },
      "expansion": "Old Irish daire (“oak forest”)"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "cel-pro",
        "3": "*daru"
      },
      "expansion": "Proto-Celtic *daru"
    }
  ],
  "links": [
    [
      "Doire",
      "Doire#Irish"
    ],
    [
      "doire",
      "doire#Irish"
    ],
    [
      "daire",
      "daire#Old_Irish"
    ],
    [
      "*daru",
      "Reconstruction:Proto-Celtic/daru"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "name",
      "glosses": [
        "A city in northwestern Northern Ireland; also known as Londonderry.",
        "One of the traditional counties in northwestern Northern Ireland; known as County Derry, or officially as County Londonderry.",
        "A town in Rockingham County, New Hampshire, United States.",
        "A borough and township in Westmoreland County, Pennsylvania, United States."
      ],
      "tags": [
        "countable",
        "uncountable"
      ],
      "recordId": "193d8131b064a2ad17aa658e3c67c8fa7b3a627618c60623e54a42f3bab6d852",
      "rawRecordSha256": "99ec630b0201452fba16bca03cd29ded272efe21e45560e1ac42f93245dda8f2",
      "sourceRecordOrdinal": 804948
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 3,
    "glosses": 0
  }
}

Where this record stops

This page does not supply an independently verified sound-change sequence, first-use manuscript or complete family tree unless a cited analysis explicitly establishes one. Missing detail here is a limit of this record—not a claim that humanity knows nothing more.

An older meaning does not determine what a word must mean today. Follow the sources, preserve disagreements, and keep ancestry separate from interpretation.

Contribute located evidence for Derry →

Source and snapshot

Imported from Wiktionary contributors; extracted by Tatu Ylonen / Wiktextract / Kaikki.org. Selected fields are reformatted and grouped; wording, source identity and etymology sections are retained. CC-BY-SA-4.0 applies to the imported source material.

Dump: 2026-10-01 · Extracted: 2026-10-30. These are snapshot dates, not the word’s first attestation or the page’s revision date.

Source entry and bibliography ↗Wiktionary revision history ↗Acquisition and rights ledger
Machine-source provenance
Source SHA-256
5ff2c072f8099f2d2ce484bd6957bf179f046d2ad37bc36555edf8bb84cb5291
Import run
73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID
w-RGVycnk