Cognomen Trelawney (Trelawney 
) , throughout the world, is a very rare surname. The cognomen Trelawney is characteristic of South Africa, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States. Measured by absolute frequency, the name is most common in South Africa, India, and the United States. Also, Trelawney is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Trelawney | United Kingdom, Australia, United States, India, South Africa |
| robert trelawney English politician (b. 1598) |
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| edward trelawney Dean of Exeter (b. 1655) |
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| john bernard jago trelawney American mineral collector of Palo Alto (b. 1909) |
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| florence trelawney Peerage person ID=461799 |
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