Cognomen Sewel (Sewel 
) , all over the world, is a rare last name. The cognomen Sewel is habitual in New Zealand, where it is a very rare surname, Malaysia, and the United Kingdom. In absolute terms, the name is most common in the United States, the United Kingdom, and Malaysia. Also, Sewel is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sewel | United Kingdom, United States, Malaysia, Poland, India |
| william sewel Dutch historian, NL (b. 1653) |
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| john sewel, baron sewel British academic and Baron (born 1946), GB (b. 1946) |
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| leonard buttifant sewel Peerage person ID=694372 |
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| mary sewel Peerage person ID=700743 |
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