Cognomen Brannan (Brannan 
) , around the world, is a common surname. The family name Brannan is habitual in Reunion, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and the United States. Not in comparison with a country's population, the name is most common in the United States, the United Kingdom, and Australia. Very seldom, Brannan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Brannan | United Kingdom, Australia, Reunion, United States, Canada |
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samuel brannan American politician (1819-1889), US (b. 1819) |
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john milton brannan Union army general, US (b. 1819) |
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| william penn brannan artist 1825-1866, US (b. 1825) |
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| samuel s. brannan American politician 1835-1880, US (b. 1835) |
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| hugh brannan (1843-1917) (b. 1843) |
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otis brannan American baseball player, US (b. 1899) |
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charles brannan American politician (1903-1992), US (b. 1903) |
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| john winters brannan American physician, US (b. 1853) |
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| joseph doddridge brannan (b. 1848) |
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| sophie marston brannan US (b. 1878) |
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| robert e. brannan American football, basketball, and baseball player and coach, US (b. 1891) |
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solomon brannan American football player, US (b. 1942) |
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chuck brannan American politician from Florida, US (b. 1962) |
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| andy brannan Australian rules footballer (1919-1997) (b. 1919) |
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| robert brannan English footballer (1924-1986), GB (b. 1924) |
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