Cognomen Cadell (Cadell 
, 卡德尔 
) , all over the world, is a rare last name. The cognomen Cadell is habitual in Northern Europe, particularly Isle of Man, where it is quite a rare surname, Ireland, where it is a rare surname, and Denmark. Not in comparison with a country's population, this name is the most popular in the United States, Indonesia, and Australia. Very seldom, Cadell is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cadell | Indonesia, United Kingdom, Australia, United States, Denmark |
| 卡德尔 | China |
| cadell ddyrnllug King of Kingdom of Powys, GB (b. 430) |
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| cyngen ap cadell king of Powys in eastern Wales, IT (b. 778) |
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| cadell ap elisedd King of Powys (b. 800) |
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| cadell ap rhodri King of Seisyllwg (b. 854) |
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| clydog ap cadell (b. 880) |
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| cadell ab einion King of Deheubarth in South Wales, GB (b. 950) |
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arnau cadell sculptor, ES (b. 1200) |
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| cadell ap gruffydd Prince of the kingdom of Deheubarth, GB (b. 1200) |
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| jaume cadell Spanish military personnel, ES (b. 1600) |
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| joan cadell ES (b. 1600) |
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| william cadell Scottish merchant (b. 1668) |
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thomas cadell English bookseller and publisher (1742-1802), GB (b. 1742) |
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| william cadell Scottish industrialist, GB (b. 1708) |
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william archibald cadell British businessman, GB (b. 1775) |
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| william cadell Scottish ironmaster (c.1737-1819), GB (b. 1737) |
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