Cognomen Finnegan (Ó 
, Finnegan , Финнеган 
) , around the world, is a common surname. The surname Finnegan is characteristic of Ireland, where it is quite a common surname, Belize, and the United Kingdom, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in the United States, Ireland, and the United Kingdom. Very seldom, Finnegan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ó, Finnegan | Australia, Ireland, United Kingdom, United States, China |
| Финнеган | Russia |
Finigan, Fionnagáin, and Фіннеган
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james e. finnegan American politician, US (b. 1892) |
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terence p. finnegan United States Air Force Major General; American Roman Catholic priest and chaplain (1904-1990), US (b. 1904) |
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edward rowan finnegan American politician (1905-1971), US (b. 1905) |
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joseph finnegan American cryptographer, US (b. 1905) |
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cornelius t. finnegan jr. politician in Massachusetts, US, US (b. 1918) |
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william h. finnegan politician in Massachusetts, US, US (b. 1926) |
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| george finnegan boxer (1881-1913), US (b. 1881) |
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| ambrose joseph finnegan maternal grandfather of Joe Biden, US (b. 1883) |
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ruth finnegan British author, professor, linguistic anthropologist, GB (b. 1933) |
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| richard j. finnegan American newspaper editor (b. 1884) |
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| philip j. finnegan United States federal judge, US (b. 1886) |
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john j. finnegan American politician, US (b. 1938) |
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| william b. finnegan American horse trainer, US (b. 1890) |
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| casey finnegan American football coach, college athletics administrator, US (b. 1890) |
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chris finnegan British boxer, GB (b. 1944) |
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