Surname O'Dowd (O'Dowd 
, أودود, أوداود) , in all the world, is quite a rare cognomen. The last name O'Dowd is characteristic of Ireland, where it is quite a common surname, Barbados, where it is quite a rare surname, and Australia. Measured by absolute frequency, the name is most common in Ireland, Australia, and the United Kingdom.
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| O'Dowd | United Kingdom, Australia, Ireland, United States, Canada |
| james o'dowd Anglo-Irish barrister-at-law, IE (b. 1802) |
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bernard o'dowd Australian poet and activist, AU (b. 1866) |
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james t. o'dowd politician in Massachusetts, US, US (b. 1877) |
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| james o'dowd British barrister, IE (b. 1829) |
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patrick o'dowd Irish politician (b. 1892) |
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mike o'dowd American boxer, US (b. 1895) |
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| john o'dowd Irish politician; Member of Parliament (1856-1937) (b. 1856) |
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fergus o'dowd Irish politician, IE (b. 1948) |
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ken o'dowd Australian politician, AU (b. 1950) |
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| james thomas o'dowd Catholic bishop, US (b. 1907) |
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| peter o'dowd English footballer (1908-1964), GB (b. 1908) |
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timmy o'dowd Gaelic Footballer, IE (b. 1963) |
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john o'dowd Irish politician (born 1967), GB (b. 1967) |
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| christopher o'dowd Founder member of the SAS, GB (b. 1920) |
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| donald o'dowd reading, US (b. 1927) |
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