๐ How Rare Are You in Brazil?
๐ง๐ท Genetic Landscape of Brazil
Brazil is one of the most genetically mixed nations on Earth, the result of centuries of blending between Indigenous, Portuguese, African, and later Italian, German, Japanese, and Arab immigrants. The south (Paranรก, Santa Catarina) shows strong European ancestry with high rates of blue eyes and light skin. The northeast reflects heavy West African heritage from the slave trade era. The Amazon region carries Indigenous genetics found nowhere else. Sรฃo Paulo has the largest Japanese diaspora outside Japan. This extreme admixture means Brazilians often carry ancestry from 3-4 continents simultaneously.
Ancestry here is also something people declare about themselves. The national census asks respondents to choose a colour or race from five options, branca, preta, parda, amarela and indรญgena, and a very large share choose parda, a middle category that covers an enormous range of appearance and commits to no single origin. The same person may be read one way in Salvador and another in Curitiba, and families commonly contain siblings who would tick different boxes. That gap between what ancestry records and what people call themselves is unusually wide in Brazil, which is why any claim about how rare a trait is here describes a neighbourhood far more honestly than it describes a nation.
๐ The one appearance question Brazil actually asks
The Censo 2022 basic questionnaire has 26 questions and the longer sample questionnaire has 77. Neither asks about eye colour or hair colour, and nor do the sample's extra topics, which run from fertility and religion through migration and disability to autism. The only appearance-adjacent question is cor ou raça, question 4.01 on the basic form, where a person picks one of five words for themselves: branca, preta, amarela, parda, indígena. It is a declaration, not a measurement.
And it moves. Between the 2010 and 2022 censuses the number declaring branca fell from 91,051,646 to 88,252,121 while the country itself grew; preta rose from 14,517,961 to 20,656,458; amarela fell from 2,084,288 to 850,130. Nobody's ancestry changed in twelve years. What changed was what people called themselves. Which is why the eye and hair tables on this page are estimates borrowed from elsewhere: neither question is on either 2022 form, so there is no Brazilian census figure to use.
๐๏ธ Eye Color
| Brown | 42% |
| Dark Brown | 30% |
| Hazel | 12% |
| Green | 8% |
| Blue | 7% |
| Gray | 1% |
๐ Hair Color
| Black | 35% |
| Dark Brown | 30% |
| Brown | 20% |
| Blonde | 8% |
| Red | 2% |
| Other | 5% |
๐ฉธ Blood Type
| O+ | 36% |
| A+ | 34% |
| B+ | 8% |
| O- | 7% |
| A- | 8% |
| AB+ | 3% |
| B- | 2% |
| AB- | 2% |
Trait frequencies on this page come from public and institutional datasets โ see Data Sources.
🧮 Calculate Your Rarity in Brazil
Pick your eye colour, hair colour and blood type. The calculator uses Brazil's own figures from the tables above, not world averages.
This is an estimate, not a measurement. It multiplies three national frequencies as if they were independent, and they are not: eye and hair colour share pigmentation genes, so a combination that tends to run together, such as blue eyes with blonde hair, is more common than the multiplication suggests, while one that rarely does, such as blue eyes with black hair, is rarer. Blood type is independent of both. The frequencies are national averages from public datasets — see Data Sources.
That number describes the body you were born with. Fraeon, our other site, does the same arithmetic for the part you chose: the films, series, games, books, anime and manga you have actually finished. Start your log →
๐ค Where IBGE stops telling you about your surname
In November 2025 IBGE published surnames from the 2022 Census for the first time. Silva turns up in the names of 34,030,104 people, roughly one in six of the 203,080,756 counted, then Santos at 21,367,475 and Oliveira at 11,708,947. Those totals overlap, because IBGE counted each surname recorded for a person, whatever order it was written in. Across the whole count sit more than 200 thousand distinct surnames.
The technical note published alongside it sets a floor: a name is shown only if it occurs at least 20 times nationally, 15 times within a state, or 10 times within a municipality, with the same filter reapplied decade by decade. Below that threshold the name was collected but is not published. Spelling is identity here too — Ana and Anna, Luis and Luiz are tallied separately, accents are dropped, and da, de and dos are removed before counting. Name rarity.
โ๏ธ Surname order, and the law that leaves it open
Lei nº 14.382, of 27 June 2022, rewrote Article 55 of Brazil's civil registry law. A person's given name is followed by the surnames of their parents, or of further ancestors if certificates prove the line, taken em qualquer ordem — in any order. Nothing in the article fixes where a surname sits in the string.
What the law fixes is the purpose. If the person registering the birth gives no full name, the registrar adds at least one surname from each parent in whatever order the registrar judges most convenient to avoid homonymy, and is told to advise the parents on adding surnames for the same reason. Either parent has fifteen days to object. The order is left open; what the law presses for is enough surnames to keep two people from arriving as the same person on paper.
โญ Rare Facts About Brazil
Where the Brazilian numbers on this page come from
Population and the colour-or-race counts are IBGE's Censo 2022: 203,080,756 residents on 1 August 2022. The name and surname figures are IBGE's Nomes no Brasil, published November 2025. Height is measured by IBGE's Pesquisa Nacional de Saúde 2019, which publishes percentiles for people aged 15 and over rather than a single average. Blood group is on neither census questionnaire; those percentages come from FHEMOAM, the Amazonas state blood service. Neither the 2022 Census basic questionnaire nor the longer sample questionnaire asks about eye colour or hair colour, so those two tables are illustrative estimates, not official figures. Last checked September 2026. Data Sources