Etymology

McGrath

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

Irish Mac Craith
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The story

  1. Irish · derived fromMac Craith
  2. English todayMcGrath

Anglicized form of Irish Mac Craith, perhaps a variant of Mac Raith (“son of Rath”), a byname from rath (“abundance, prosperity”).

Etymology from Wiktionary, CC BY-SA 4.0.