Surname Castanheira (Castanheira 
) , globally, is a common last name. The family name Castanheira is characteristic of Portugal, where it is quite a common surname, Luxembourg, where it is quite a rare surname, and Brazil. Not in comparison with a country's population, it most frequently occurs in Portugal, Brazil, and France.
| VARIANT | COUNTRY |
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| Castanheira | Portugal, Angola, France, Brazil, Mozambique |
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alexandre de abreu castanheira (b. 1783) |
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jorge castanheira Carnival Executive, BR (b. 1962) |
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| josé manuel castanheira Portuguese architect, PT (b. 1952) |
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| josé pedro castanheira Portuguese journalist, PT (b. 1952) |
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| maria auxiliadora villar castanheira Brazilian volleyball player, BR (b. 1960) |
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| carlos castanheira (b. 1957) |
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| bruno castanheira Portuguese cyclist, PT (b. 1977) |
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| guilherme castanheira researcher |
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| nádia l castanheira researcher |
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| fernanda v castanheira researcher |
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| mário castanheira cinematographer |
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| erica castanheira researcher, ORCID id # 0000-0002-5468-065X |
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| micael castanheira economist (Université Libre de Bruxelles) |
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| pedro castanheira researcher (ORCID 0000-0002-1178-3886) |
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| gudbem borges castanheira Brazilian politician, BR |
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