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Cognomen O'Conor (O'Conor
, オコナー) , all over the world, is a rare last name. The family name O'Conor is characteristic of Ireland, where it is quite a rare surname, Australia, where it is a rare surname, and Nicaragua. Not in comparison with a country's population, it is the most numerous in Ireland, the United States, and Australia. Very seldom, O'Conor is the forename as well as the last name.