Last name Clewell (Clewell 
) , globally, is a rare cognomen. The last name Clewell is habitual in the United States, where it is a rare surname, New Zealand, and Canada, where it is a very rare surname. Much less frequently, Clewell is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Clewell | United Kingdom, New Zealand, United States, Canada |
| john henry clewell 1855-1922 , Moravian clergyman and educator (b. 1855) |
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| andre francis clewell botanist (b. 1934) |
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| david clewell American poet (1955-2020), US (b. 1955) |
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| william david clewell Ph.D. University of Maryland College Park 1975 |
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| amy clewell researcher |
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