Cognomen Deegan (迪根 
, Deegan 
, Диган 
) , globally, is quite a common last name. The cognomen Deegan is habitual in Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and the United Kingdom. Measured by absolute frequency, it most frequently occurs in the United States, Ireland, and the United Kingdom. Very seldom, Deegan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 迪根 | China |
| Deegan | Australia, Ireland, Canada, United States, United Kingdom |
| Диган | Ukraine, Russia, Kazakhstan |
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dummy deegan American baseball player, US (b. 1874) |
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| john deegan American politician – Minnesota -House 1903-06 (District 26), US (b. 1858) |
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| william francis deegan American architect (1882-1932), US (b. 1882) |
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| frances m. deegan US author, GB (b. 1901) |
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| cornelius s. deegan American politician and businessman (1901-1967) (b. 1901) |
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| millie deegan American baseball player (1919-2002), US (b. 1919) |
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peter deegan American attorney, US (b. 1970) |
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brian deegan American motorcycle racer, US (b. 1975) |
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patricia deegan American psychologist, US |
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| jim deegan British field hockey player, GB (b. 1933) |
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| bill deegan American baseball umpire, US (b. 1935) |
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| gene a. deegan American military officer, US (b. 1936) |
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| davinder singh deegan Kenyan field hockey player, KE (b. 1946) |
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| marilyn deegan British historian (b. 1950) |
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hailie deegan American stock car racing driver, US |
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