Family name Sintra (Sintra 
, สินทรา 
) , throughout the world, is quite a rare surname. The cognomen Sintra is characteristic of Portugal, where it is quite a rare surname, Luxembourg, and Angola, where it is a rare surname. Not in comparison with a country's population, it is commonest in Portugal, Brazil, and Thailand. Much less frequently, Sintra is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sintra | Portugal, Angola, Spain, Brazil, Trinidad and Tobago |
| สินทรา | Thailand |
| pedro de sintra Portuguese explorer, PT (b. 1500) |
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| alfredo santos sintra PT (b. 1890) |
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| mónica sintra Portuguese singer, PT (b. 1978) |
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| gonçalo de sintra Portuguese explorer |
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| tânia e. sintra researcher |
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| sara sintra researcher (ORCID 0000-0002-5244-7440) |
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