English word origin

Etymology of loon

From Middle English louen, lowen (“rascal; rogue”), probably of Middle Dutch or Middle Low German origin. Compare Dutch loen (“simpleton”). Or, related to etymology 2, due to the bird's loud cry. Folk etymology associate

2 source sectionsExtended source reportWiktionary original ↗

In this entry · 2 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.

Source etymology 1

Original entry ↗

noun

A crazy or deranged person; a lunatic. · An idler, a lout. · A boy, a lad. · A harlot; mistress.

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

Relationships mentioned by the source

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

Inherited-form mentionlouenenm
Cognate mentionloennl · simpleton

This page abbreviates 4 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.

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  "templates": [
    {
      "name": "inh",
      "args": {
        "1": "en",
        "2": "enm",
        "3": "louen"
      },
      "expansion": "Middle English louen"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "dum",
        "3": "-"
      },
      "expansion": "Middle Dutch"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gml",
        "3": "-"
      },
      "expansion": "Middle Low German"
    },
    {
      "name": "cog",
      "args": {
        "1": "nl",
        "2": "loen",
        "t": "simpleton"
      },
      "expansion": "Dutch loen (“simpleton”)"
    }
  ],
  "links": [
    [
      "louen",
      "louen#Middle_English"
    ],
    [
      "lowen",
      "lowen#Middle_English"
    ],
    [
      "loen",
      "loen#Dutch"
    ],
    [
      "etymology 2",
      "loon#Etymology 2"
    ],
    [
      "Folk etymology",
      "folk etymology"
    ],
    [
      "lunatic",
      "lunatic#English"
    ],
    [
      "loony",
      "loony#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "A crazy or deranged person; a lunatic.",
        "An idler, a lout.",
        "A boy, a lad.",
        "A harlot; mistress."
      ],
      "tags": [
        "slang",
        "obsolete",
        "Scotland",
        "Ulster"
      ],
      "recordId": "d23ddba7d0828d168530c240f74b01ae5f63720d126ff00550ca07037e3a9be7",
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}

Source etymology 2

Original entry ↗

noun

Any of various birds, of the order Gaviiformes, of North America and Europe that dive for fish and have a short tail, webbed feet and a yodeling cry.

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

Of North Germanic origin, from Old Norse lómr (“loon”), ultimately imitative of the bird's cry, particularly when it's in danger. Distantly related to lament, probably sharing Proto-Indo-European *leh₂- (expressive root).

Relationships mentioned by the source

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

Derivation mentionlómrnon
Derivation mention*leh₂-ine-pro

Inspect preserved source fields

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

{
  "templates": [
    {
      "name": "taxfmt",
      "args": {
        "1": "Gavia immer",
        "2": "species"
      },
      "expansion": "Gavia immer"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "gmq"
      },
      "expansion": "North Germanic"
    },
    {
      "name": "der",
      "args": {
        "1": "en",
        "2": "non",
        "3": "lómr",
        "4": "",
        "5": "loon"
      },
      "expansion": "Old Norse lómr (“loon”)"
    },
    {
      "name": "onomatopoeic",
      "args": {
        "1": "en",
        "title": "imitative"
      },
      "expansion": "imitative"
    },
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      "name": "der",
      "args": {
        "1": "en",
        "2": "ine-pro",
        "3": "*leh₂-"
      },
      "expansion": "Proto-Indo-European *leh₂-"
    }
  ],
  "links": [
    [
      "Common loon",
      "common loon"
    ],
    [
      "Gavia immer",
      "Gavia immer#Translingual"
    ],
    [
      "lómr",
      "lómr#Old_Norse"
    ],
    [
      "lament",
      "lament#English"
    ],
    [
      "*leh₂-",
      "Reconstruction:Proto-Indo-European/leh₂-"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Any of various birds, of the order Gaviiformes, of North America and Europe that dive for fish and have a short tail, webbed feet and a yodeling cry."
      ],
      "tags": [
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        "US"
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}

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 loon →

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-bG9vbg