Etymology

McMahon

M3C3M3A1H4O1N1

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

Irish Mac Mathúna ← Middle Irish mac
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The story

  1. Middle Irish · derived frommac“son”
  2. Irish · derived fromMac Mathúna
  3. English todayMcMahon

Anglicized form of Irish Mac Mathúna, earlier spelling Mac Mathghamhna (literally “son of the bear”), from Middle Irish mac (“son”) and mathgamain (“bear”).

Etymology from Wiktionary, CC BY-SA 4.0.