Etymology

Sheehan

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

Irish Ó Síodhacháin
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The story

  1. Irish · derived fromÓ Síodhacháin“descendant of Síodhachán”
  2. English todaySheehan

Reduced Anglicized form of Irish Ó Síodhacháin (“descendant of Síodhachán”), a personal name derived from a diminutive of síodhach (“peaceful”).

Etymology from Wiktionary, CC BY-SA 4.0.