Cognomen Markwell (Markwell 
) , across the world, is quite a rare last name. The cognomen Markwell is characteristic of Australia, where it is quite a rare surname, Iceland, and the United Kingdom, where it is a rare surname. In absolute terms, the name is most common in the United States, the United Kingdom, and Australia. Very seldom, Markwell is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Markwell | Canada, United Kingdom, United States, Philippines, Australia |
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christopher richard markwell Scottish-Canadian artist, GB (b. 1944) |
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| don markwell American talk show host (b. 1936) |
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| terry markwell American actress, US (b. 1952) |
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| stephen markwell Group Chief Executive Officer, National Computing Centre, 2008–17, GB (b. 1953) |
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| donald markwell Social scientist, educational leader, public policy thought leader, AU (b. 1959) |
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| hazel mcfadyen markwell (b. 1950) |
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| lisa markwell British journalist (b. 1965) |
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| diego markwell Dutch baseball player, NL (b. 1980) |
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| david markwell researcher |
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| katherine markwell researcher |
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| alexandra markwell researcher |
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| kevin markwell researcher ORCID ID = 0000-0002-1814-1480 |
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| clyde markwell British architect, GB |
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