Cognomen Dempster (Dempster 
) , in the world, is quite a common surname. The cognomen Dempster is habitual in Jersey, where it is quite a common surname, Jamaica, and Australia, where it is quite a rare surname. In absolute terms, the name is most common in the United Kingdom, the United States, and Australia. Very seldom, Dempster is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dempster | United Kingdom, Australia, United States, Canada, Jamaica |
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thomas dempster Scottish philologist, historian, poet and etruscologist, GB (b. 1579) |
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george dempster of dunnichen Scottish advocate, landowner, agricultural improver and politician; (1732-1818), GB (b. 1732) |
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| james dempster (1740-1804) (b. 1740) |
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| margaret dempster (1769-1842) (b. 1769) |
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| dempster heming (1778-1874), GB (b. 1778) |
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john dempster Union Navy Medal of Honor recipient, GB (b. 1839) |
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| john dempster 1794-1863 , Methodist educator and minister (b. 1794) |
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| rose dempster (1809-1845) (b. 1809) |
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| james mclean dempster (1810-1890) mariner and grazier (b. 1810) |
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william dempster Canadian police officer (1876–1964), GB (b. 1876) |
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george dempster Australian rules footballer (1882-1960), AU (b. 1882) |
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arthur jeffrey dempster Canadian-American physicist, CA (b. 1886) |
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| charles dempster Australian politician, AU (b. 1839) |
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| andrew dempster (1843-1909) explorer and grazier (b. 1843) |
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| dempster woodworth American politician, US (b. 1844) |
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