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Last name origins & meanings:

1. Irish: Anglicized form of Gaelic Ó Cobhthaigh ‘descendant of Cobhthach’, a byname meaning ‘victorious’.
2. Irish: Anglicized form of Gaelic Ó Cathbhadha ‘descendant of Cathbhadh’ (‘battle tent’), Ó Cathbhuadhaigh ‘descendant of Cathbhuadhach’ (‘battle victorious’), or Ó Cathmhogha ‘descendant of Cathmhugh’, a byname meaning ‘battle slave’.

This name appears in the following lists: Poets