An Irish surname meaning 'descendant of Síodhachán,' often anglicized from the Gaelic original. The name is particularly associated with families from Counties Cork and Kerry in Ireland.
From Irish Gaelic 'Ó Síodhacháin,' meaning 'descendant of Síodhachán.' The personal name Síodhachán derives from 'síodhach' meaning peaceful, with the diminutive suffix '-án,' essentially meaning 'little peaceful one.'
The Sheehan surname became internationally recognized through Cindy Sheehan, the anti-war activist whose protest outside President Bush's ranch brought attention to military families' perspectives on the Iraq War, showing how individual names can become symbols of broader movements.
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