Etymology

Geoghegan

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Today it means: A surname from Irish. Full definition →

Irish Mag Eochagáin
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The story

  1. Irish · derived fromMag Eochagáin“son of Eochagán”
  2. English todayGeoghegan

Reduced Anglicized form of Irish Mag Eochagáin (“son of Eochagán”), a diminutive of Eochaidh. Compare Caughey.

Etymology from Wiktionary, CC BY-SA 4.0.