Family name Smithson (Smithson 
, Смитсон) , across the world, is a common surname. The surname Smithson is habitual in Isle of Man, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and New Zealand. In absolute terms, it is the most numerous in the United States, the United Kingdom, and Canada.
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| Smithson | United Kingdom, Australia, United States, Canada, New Zealand |
| hugh smithson English Member of Parliament (c1662-1740) (b. 1662) |
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james smithson British chemist, FR (b. 1765) |
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harriet smithson Anglo-Irish actress (1800-1854), FR (b. 1800) |
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| david smithson 16 Jun 1800 - 13 Jun 1865 (b. 1800) |
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| john henry smithson British clergyman; minister of the New Jerusalem Church, GB (b. 1803) |
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forrest smithson athletics competitor (1884-1962), US (b. 1884) |
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| adeline smithson 21 Mar 1855 - 27 Aug 1891 (b. 1855) |
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peter smithson British architect (1923-2003), GB (b. 1923) |
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| annie m. p. smithson Irish writer, IE (b. 1873) |
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alison smithson British architect, GB (b. 1928) |
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| florence smithson British singer and actor, GB (b. 1884) |
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mike smithson British politician (born 1946), GB (b. 1946) |
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| mildred taylor smithson (1896-1985) (b. 1896) |
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john smithson British film producer (b. 1950) |
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mike smithson American baseball player, US (b. 1955) |
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