O'Shaughnessy

'' | coat of arms = | country = Kingdom of Connacht | origin = Irish Gaels | parent house = Connachta (Uí Fiachrach Aidhne) | titles = * King of Connacht * King of Uí Fiachrach Aidhne * Lord of Cenél Áeda na hEchtge * Baron Shaughnessy | founder = Seachnasach mac Donnchadh | final ruler = Diarmaid Ó Seachnasaigh | current head = | founding year = | dissolution = | cadet branches = }}

Ó Seachnasaigh, '''O'Shaughnessy, collectively Uí Sheachnasaigh, clan name Cinél nAedha na hEchtghe''', is a family surname of Irish origin. The name is found primarily in County Galway and County Limerick. Their name derives from Seachnasach mac Donnchadh, a 10th-century member of the Uí Fiachrach Aidhne, which the Ó Seachnasaigh were the senior clan of. The town of Gort, Ireland, was the main residence of the family since at least the time of their ancestor, King Guaire Aidne mac Colmáin. Provided by Wikipedia