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Cognomen O Connor (O Connor
) , all over the world, is quite a common last name. The cognomen O Connor is habitual in Ireland, where it is quite a common surname, Reunion, and Australia, where it is quite a rare surname. In absolute terms, it most frequently occurs in Ireland, the United States, and Australia.
| VARIANT | COUNTRY |
|---|---|
| O Connor | Australia, Indonesia, United States, Ireland, United Kingdom |