Last name O'Connor (O'Connor 
, オコナー, О'Коннор 
) , across the world, is a common family name. The cognomen O'Connor is habitual in Ireland, where it is a common surname, Jersey, and Australia, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in the United States, Ireland, and Australia.
| cathal o'connor Irish spy and rebel (b. 1540) |
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| bernardo o'connor Spanish-Irish general, ES (b. 1696) |
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arthur o'connor Irish politician, FR (b. 1763) |
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thomas o'connor Irish writer, US (b. 1770) |
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| hugh o'connor (1730-1801) (b. 1730) |
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francisco burdett o'connor bolivian military and politician of irish origin (1791-1871), IE (b. 1791) |
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james arthur o'connor Irish artist (1792-1841), IE (b. 1792) |
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feargus o'connor Irish politician (1794-1855), IE (b. 1794) |
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| thomas o'connor Irish bishop (b. 1750) |
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| malachy o'connor (1753-1820) (b. 1753) |
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luke o'connor Irish army officer, IE (b. 1806) |
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michael o'connor Irish-born Jesuit and Catholic bishop (1810-1872), IE (b. 1810) |
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| hugh o'connor (1771-1839) (b. 1771) |
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| valentine o'connor (1773-1829) (b. 1773) |
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james o'connor Catholic bishop, US (b. 1823) |
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