From Ó Seanacháin, ‘old, wise one’ — a Clare and Tipperary name built on the same root as seanchaí, Ireland's traditional storyteller.
The Shanahan certificate.
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Gaelic Origin · Root meaning ‘old, wise’
Shanahan comes from Ó Seanacháin, a diminutive of sean, ‘old’ — carrying the same sense of accumulated wisdom found in seanchaí, the traditional keeper and teller of a community's stories. The family were established across Clare and Tipperary.
A name that means, roughly, ‘the wise old one’ — not a bad inheritance for any family to carry.
Irish form: Ó Seanacháin
