Updated June 9, 2019 Share: Family name origins & meanings Irish : (Counties Leix and Offaly) variant of Sword 2, with superfluous English patronymic -s.Irish : habitational name from a place of this name in County Dublin.Irish : Anglicized form of Gaelic Ó Claimhín, a translation as though from claidheamh ‘sword’ (see Clavin).