Cognomen Thornbury (Thornbury 
) , in the entire world, is quite a rare surname. The family name Thornbury is habitual in Ireland, where it is quite a rare surname, Australia, where it is a rare surname, and New Zealand. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Thornbury | United Kingdom, Ireland, Canada, Australia, United States |
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george walter thornbury British writer, GB (b. 1828) |
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| william anslow thornbury Prolific English marine painter of the Victorian period, who signed in many ways (b. 1847) |
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| clara thornbury (b. 1847) |
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| william d. thornbury 1900-1986 (b. 1900) |
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gregory alan thornbury American academic, US (b. 1970) |
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| dave thornbury American trick roper and saddle maker (born 1948) (b. 1948) |
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| scott thornbury New Zealand academic (b. 1950) |
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| bill thornbury American actor and musician, US (b. 1952) |
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| tom thornbury Canadian ice hockey defenceman, CA (b. 1963) |
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| philip thornbury (d.1457) of Little Munden and Bygrave, Herts |
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| john thornbury, of faversham - Bef 16 Feb 1473/4 (date will proven) |
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| philippa thornbury - Bef 1486 |
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| walter de thornbury Irish bishop |
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| james thornbury American singer, US |
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| sam thornbury screenwriter |
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