People Ireland Dermott Ó Seachnasaigh peoplepill id: dermott-o-seachnasaighDÓS 8 views today 8 views this weekIrish chief of the nameDermott Ó SeachnasaighBiographyListsAlso ViewedListsDermott Ó Seachnasaigh is in following listsBy work and/or countryNotable Irish peopleGender:Male, Born in:Years 1600 to 1649By category1673 deaths17th-century Irish peopleO'Shaughnessy familyPeople from County GalwayFrom our partnersSponsoredDermott Ó Seachnasaigh