Cognomen Hewetson (Hewetson 
) , around the world, is a rare surname. The surname Hewetson is habitual in Isle of Man, where it is quite a rare surname, New Zealand, and Ireland, where it is a rare surname. In absolute terms, it is the most numerous in the United Kingdom, Australia, and South Africa.
| VARIANT | COUNTRY |
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| Hewetson | United Kingdom, Australia, South Africa, United States, New Zealand |
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christopher hewetson Irish sculptor, IE (b. 1737) |
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| nicholas hewetson (b. 1703) |
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| james hewetson Texas empresario (b. 1797) |
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henry bendelack hewetson English surgeon, naturalist and writer, GB (b. 1850) |
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| maria hewetson IN (b. 1821) |
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john hewetson British anarchist physician (1913–1990), GB (b. 1913) |
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| john thomas hewetson English physician (1872–1936), GB (b. 1872) |
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| edward hewetson English cricketer (1902-1977), GB (b. 1902) |
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| reginald hewetson British Army general (1908-1993), GB (b. 1908) |
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| yvonne mary hewetson (1916-1986) (b. 1916) |
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| richard tatton wedderburn hewetson (1924-2010) (b. 1924) |
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| christopher hewetson British Archdeacon (b. 1937) |
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| al hewetson comics writer, GB (b. 1946) |
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| n. j. hewetson (b. 1958) |
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| richard allan webster hewetson (born 1975) (b. 1975) |
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