Last name Birtwell (Birtwell 
) , around the globe, is a rare surname. The cognomen Birtwell is habitual in the United Kingdom, where it is a rare surname, Singapore, and Australia, where it is a very rare surname. 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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| Birtwell | United Kingdom, Italy, Australia, United States, Canada |
| alec birtwell cricketer (1908-1974), GB (b. 1908) |
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| celia birtwell British textile designer, GB (b. 1941) |
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| ian birtwell English rugby union footballer and coach (b. 1944) |
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| emily jane birtwell (born 1970) (b. 1970) |
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| kelly birtwell researcher (ORCID 0000-0003-0285-2939) |
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| n. c. birtwell researcher |
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| stanley birtwell Peerage person ID=137187 |
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| daniel thomas birtwell Peerage person ID=390654 |
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| kirstin brown birtwell researcher (ORCID 0000-0003-0274-6570) |
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| andrew george richard birtwell Peerage person ID=137186 |
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