Cognomen O'Dwyer (O'Dwyer 
) , in the world, is quite a common surname. The surname O'Dwyer is characteristic of Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and New Zealand. Not in comparison with a country's population, it most frequently occurs in Ireland, Australia, and the United Kingdom.
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| O'Dwyer | Australia, Ireland, Canada, United States, United Kingdom |
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joseph o'dwyer American physician, US (b. 1841) |
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| andrew o'dwyer Irish politician, died 1877, IE (b. 1800) |
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edward f. o'dwyer American judge (b. 1860) |
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michael o'dwyer British colonial administrator, GB (b. 1864) |
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william o'dwyer Irish-American politician and diplomat; 100th Mayor of New York City (1946-1950); attained rank of Brigadier General in WW II, US (b. 1890) |
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| edward thomas o'dwyer Roman Catholic bishop, IE (b. 1842) |
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paul o'dwyer American politician, US (b. 1907) |
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| richard horton o'dwyer Canadian politician and merchant (1858-1922), CA (b. 1858) |
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| robert o'dwyer Irish composer, GB (b. 1862) |
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tom o'dwyer Australian cricketer (1919-2005), AU (b. 1919) |
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| gerald o'dwyer Australian rules footballer (1872-1908), AU (b. 1872) |
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| martin o'dwyer Irish politician, IE (b. 1886) |
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mick o'dwyer Irish Gaelic football player and manager, IE (b. 1936) |
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| michael o'dwyer Irish hurler (1887-1975), IE (b. 1887) |
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| ellen o'dwyer Titanic survivor (b. 1889) |
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