Cognomen Summerell (Summerell 
) , in the world, is a rare last name. The last name Summerell is characteristic of Australia, where it is a rare surname, New Zealand, and the United Kingdom. Not in comparison with a country's population, it most frequently occurs in the United Kingdom, the United States, and Australia.
| VARIANT | COUNTRY |
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| Summerell | United Kingdom, Canada, Australia, New Zealand, United States |
| joseph john summerell American physician (b. 1819) |
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| bill summerell Australian rugby league footballer, coach and administrator, AU (b. 1913) |
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| carl summerell American football quarterback, US (b. 1951) |
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| brett anthony summerell Australian mycologist and phytopathologist (b. 1959) |
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| brett a summerell researcher ORCID ID = 0000-0002-6666-5756 |
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| elizabeth summerell researcher |
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| orrin f. summerell |
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| chris summerell Australian sport shooter, AU (b. 1996) |
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