Last name Castanha (Castanha 
) , across the world, is quite a rare family name. The family name Castanha is characteristic of Portugal, where it is quite a rare surname, Brazil, and Angola, where it is a rare surname. Not in comparison with a country's population, this name is the most popular in Brazil, India, and Portugal.
| VARIANT | COUNTRY |
|---|---|
| Castanha | Portugal, Brazil, United States, India, Angola |
Castanheiro, and Castanna
| marilda castanha person identified in the Museu da Pessoa collection, BR (b. 1964) |
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| ezequiel antônio castanha (b. 1963) |
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| cristina castanha archaeologist |
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| priscila m s castanha researcher (ORCID 0000-0002-1220-5308) |
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| nanci castanha researcher ORCID ID = 0000-0002-0620-8545 |
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| cyntia souza carvalho castanha researcher |
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| cristina castanha researcher |
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| neide viana castanha |
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| leewan castanha Indian footballer, IN |
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