Umana (Brazil)
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The Omagua people (also known as the Umana, Cambeba, and Kambeba) are an indigenous people in Brazil's
Amazon Basin The Amazon basin is the part of South America drained by the Amazon River and its tributaries. The Amazon drainage basin covers an area of about , or about 35.5 percent of the South American continent. It is located in the countries of Bolivi ...
. Their territory, when first in contact with Spanish explorers in the 16th century, was on the
Amazon River The Amazon River (, ; es, Río Amazonas, pt, Rio Amazonas) in South America is the largest river by discharge volume of water in the world, and the disputed longest river system in the world in comparison to the Nile. The headwaters of t ...
upstream from the present-day city of
Manaus Manaus () is the capital and largest city of the Brazilian state of Amazonas. It is the seventh-largest city in Brazil, with an estimated 2020 population of 2,219,580 distributed over a land area of about . Located at the east center of the s ...
extending into Peru. They speak the
Omagua language Omagua is a Tupí-Guarani language closely related to Cocama, belonging to the Group III subgroup of the Tupí-Guaraní family, according to Aryon Rodrigues' classification of the family. Alternate names for Omagua include: Agua, Anapia, Arian ...
. The Omagua exist today in small numbers, but they were a populous, organized society in the late Pre-Columbian era. Their population suffered steep decline, mostly from infectious diseases, in the early years of the
Columbian Exchange The Columbian exchange, also known as the Columbian interchange, was the widespread transfer of plants, animals, precious metals, commodities, culture, human populations, technology, diseases, and ideas between the New World (the Americas) in ...
. During the 18th century, the Omagua largely abandoned their indigenous identity in response to prejudice and racism that marginalized aboriginal peoples in Brazil and Peru. More tolerant attitudes led to a renewed tribal identity starting in the 1980s. The name ''Cambeba'' seems to have been applied by other neighboring tribes and refers to the Omagua custom of flattening their children's heads by binding a piece of wood to the forehead soon after birth. Omagua women would jeer at the women from other tribes, saying that their heads were "round like those of forest savages." In the 18th century, the Omaguas would point out to travelers that their flattened foreheads were a sign of cultural superiority over their neighbors, and for a long time they resisted abandoning this custom, even under missionary pressure.David Graham Sweet, "Samuel Fritz, S. J. and the Founding of the Portuguese Carmelite Mission to the Solimões," chapter 6 of ''A Rich Realm of Nature Destroyed: The Middle Amazon Valley, 1640-1750.'' Doctoral dissertation, University of Wisconsin, 1974.
/ref>


Pre-Columbian era

Recent archaeological work has revealed evidence of semi-domesticated orchards, as well as vast areas of land enriched with terra preta. Both of these discoveries, along with Cambeba ceramics discovered within the same archaeological levels, suggest that a large and organized civilization existed in the area prior to European contact. There is also evidence for complex large-scale, pre-Columbian social formations, including
chiefdoms A chiefdom is a form of hierarchical political organization in non-industrial societies usually based on kinship, and in which formal leadership is monopolized by the legitimate senior members of select families or 'houses'. These elites form a ...
, in many areas of Amazonia (particularly the inter-fluvial regions) and even large towns and cities.Mann, C. C., ed. ''1491: New Revelations of the Americas Before Columbus,'' University of Texas, 2005
Amazonians may have used ''terra preta'' to make the land suitable for the large-scale agriculture needed to support dense populations and complex social formations such as chiefdoms.


Earliest European contact

Fabulous stories about the wealth of the Cambeba and the search for
El Dorado El Dorado (, ; Spanish for "the golden"), originally ''El Hombre Dorado'' ("The Golden Man") or ''El Rey Dorado'' ("The Golden King"), was the term used by the Spanish in the 16th century to describe a mythical tribal chief (''zipa'') or king o ...
led to several early expeditions into their country, including those of Georg von Speyer in 1536, of
Philipp von Hutten Philipp von Hutten (18 December 1505 – 17 May 1546) was a German adventurer and an early European explorer and conquistador of Venezuela. He is a significant figure in the history of Klein-Venedig (1528 - 1546), the concession of Venezuela Prov ...
in 1541 and of Pedro de Ursúa in 1560.John Hemming, ''Red Gold: The Conquest of the Brazilian Indians, 1500–1760'', Harvard University Press, 1978.
In 1541 Hutten led an exploring party of about 150 men, mostly horsemen, from
Coro Coro or CORO may refer to: Entertainment * ''Coro'' (Berio), a composition by Luciano Berio * Coro (music), Italian for choir * Coro TV, Venezuelan community television channel * Omweso (Coro), mancala game played in the Lango region of Uganda * ...
on the coast of Venezuela into the
Llanos The Llanos (Spanish ''Los Llanos'', "The Plains"; ) is a vast tropical grassland plain situated to the east of the Andes in Colombia and Venezuela, in northwestern South America. It is an ecoregion of the tropical and subtropical grasslands, sav ...
, where they engaged in battle with a large number of Cambebas and Hutten was severely wounded. In 1560 Pedro de Ursúa even took the title of ''Governador del Dorado y de Omagua''. Alexander von Humboldt referred to the supposed location of the mythical golden city, "El Dorado de las Omaguas", as being "between the sources of the Rio Negro, of the Uaupes (Guape), and of the Jupura or Caqueta."Humboldt, Alexander von, ''Personal Narrative of Travels to the Equinoctial Regions of America During the Years 1799-1804,'' (chapter 25). Henry G. Bohn, London, 1853.
/ref> The Spanish explorer Francisco de Orellana, who was the first European to navigate the full length of the
Amazon River The Amazon River (, ; es, Río Amazonas, pt, Rio Amazonas) in South America is the largest river by discharge volume of water in the world, and the disputed longest river system in the world in comparison to the Nile. The headwaters of t ...
(1541–42), reported densely populated regions running hundreds of kilometers along the river, although the people there left no lasting monuments, possibly because they used local wood as their construction material. While it is possible Orellana may have exaggerated the level of development among the Amazonians, their semi-nomadic descendants are distinguished by having a hereditary yet landless
aristocracy Aristocracy (, ) is a form of government that places strength in the hands of a small, privileged ruling class, the aristocracy (class), aristocrats. The term derives from the el, αριστοκρατία (), meaning 'rule of the best'. At t ...
, a historical anomaly for a society without a sedentary, agrarian culture. This suggests they once were more settled and agrarian but became nomadic after the
demographic collapse Societal collapse (also known as civilizational collapse) is the fall of a complex human society characterized by the loss of cultural identity and of socioeconomic complexity, the downfall of government, and the rise of violence. Possible causes ...
of the 16th and 17th century, due to European-introduced diseases such as smallpox and
influenza Influenza, commonly known as "the flu", is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms ...
, while still maintaining certain traditions. Moreover, many indigenous people adapted to a more mobile lifestyle in order to escape colonialism. This might have made the benefits of terra preta, such as its self-renewing capacity, less attractive—farmers would not have been able to employ the renewed soil as they migrated for safety. Gaspar de Carvajal, who accompanied Orellana, included a description of the Omaguas in his 1542 work ''Relación del nuevo descubrimiento del famoso río Grande que descubrió por muy gran ventura el capitán Francisco de Orellana'' ("Account of the recent discovery of the famous Grand river which was discovered by great good fortune by Captain Francisco de Orellana"), discussing their culture, diet, housing, settlement patterns and political structure.
Cristóbal de Acuña Cristóbal or Cristobal, the Spanish version of Christopher, is a masculine given name and a surname which may refer to: Given name *Cristóbal Balenciaga (1895–1972), Spanish fashion designer *Cristóbal Cobo (born 1976), Chilean academic *Cri ...
, who accompanied Pedro Teixeira's 1637-38 expedition along the length of the Amazon, commented extensively on the colorful woven clothing used by the Omaguas, writing that
...all of them go about decently dressed, both the men and women, who weave...not only the clothes they need but also other items traded with their neighbors...they make very beautiful cloth, either woven in different colours or painted so perfectly that it is almost impossible to distinguish between them... Acuña, Christobal de. 1641
Nuevo descubrimiento del gran Rio de las Amazonas
Madrid: Imprenta del Reyno.
Most early chroniclers remarked on the Omagua practice of flattening the head, a practice common among indigenous South American tribes. Acuña described it in his ''Nuevo descubrimiento del gran Rio de las Amazonas'':
All of them have flat heads, which makes the men ugly-looking, though the women disguise the fact more since their heads are covered with abundant hair. The natives are so accustomed to having their heads flattened that as soon as children are born, there are put in a press where the forehead is compressed with a small board and the skull by a much larger board, which, acting as a cot, supports the entire body of the newborn...they end up with the forehead and skull flattened like the palm of the hand...looking more like a deformed bishop’s mitre than the head of a person.
The practice of head-flattening evidently died out towards the end of the eighteenth century. Later visitors to the region, including Ouvidor Sampaio and
Alexandre Rodrigues Ferreira Alexandre Rodrigues Ferreira (April 27, 1756 – April 23, 1815) was a Portuguese naturalist born in Brazil. He undertook an extensive journey which crossed the interior of the Amazon Basin to Mato Grosso, between 1783 and 1792. During this jou ...
were told that the practice was intended to distinguish the Cambeba from other tribes that continued to eat human flesh long after the Cambeba had abandoned this practice. Pedro Teixeira remarked in 1639 that "they are very savage people and though all those living along the river are savage and eat each other, the Kambeba are unsurpassed since they eat nothing other than human meat and use the skulls of those they kill as trophies."


Population estimates

The Cambeba (Omagua) were described by Europeans of the sixteenth and seventeenth centuries as the largest and most important of the various nations that inhabited the banks of the Amazon River. In addition to their high population density, the Cambeba were noteworthy for their advanced level of sociopolitical organization. They were a sedentary, civic-minded people who wore clothing and had an identifiable political authority; they also were involved in military conflicts with tribes from the interior, whose prisoners of war were incorporated into Cambeba society as domestic servants. In 1639 Pedro Teixeira observed over 400 Cambeba villages between the Javary River and the
Jutaí River The Jutaí River ( pt, Rio Jutaí) is a river in Amazonas state in north-western Brazil. Course The river flows through the Juruá-Purus moist forests ecoregion. The Jutaí river runs northeast before reaching its mouth on the southern bank of ...
, but fifty years later Samuel Fritz found only 38 villages, many of them located on islands as a means of self-defense. A smallpox epidemic in 1648 lasted three months and may have killed up to one third of the population. A second epidemic in 1710 came during a period of warfare. Modern estimates of Cambeba population size at contact range from a very conservative 4,000-7,000, to a credible 91,000. Samuel Fritz and other missionaries began concentrating the scattered indigenous communities into Jesuit reductions in order to facilitate religious indoctrination and protect them from enslavement by the Portuguese, but smallpox devastated the population, leaving the region of the upper Solimões uninhabited. In 1745 Charles Marie de La Condamine wrote in his ''Relation abrégée d'un voyage fait dans l'intérieur de l'Amérique Méridionale'',Charles Marie de La Condamine, ''Relation abrégée d'un voyage fait dans l'intérieur de l'Amérique méridionale: depuis la côte de la mer du Sud, jusqu'aux côtes du Brésil et de la Guyane, en descendant la rivière des Amazones...,'' Jean-Edme Dufour & Philippe Roux, 1778; University of Lausanne
/ref> that of the 30 Omagua villages marked on Fritz's 1707 map, he saw only ruins, adding that "all the inhabitants, frightened by the incursions of a group of bandits from Pará, who came to enslave them in their own lands, dispersed into the forest and the Spanish and Portuguese missions." Throughout the eighteenth century and until slavery was officially outlawed in Brazil in 1888, forced labor programs destroyed indigenous communities, compelling the natives to abandon their ethnic traditions and adopt the identity of ''
caboclos A caboclo () is a person of mixed Indigenous Brazilian and European ancestry, or, less commonly, a culturally assimilated or detribalized person of full Amerindian descent. In Brazil, a ''caboclo'' generally refers to this specific type of '' ...
'' (settlers of mixed race). By the late 1980s, it was assumed by many ethnographers such as
Betty Jane Meggers Betty Jane Meggers (December 5, 1921 – July 2, 2012) was an American archaeologist best known for her work in South America. She was considered influential at the Smithsonian Institution, where she was long associated in research,Lima, Peru Lima ( ; ), originally founded as Ciudad de Los Reyes (City of The Kings) is the capital and the largest city of Peru. It is located in the valleys of the Chillón River, Chillón, Rímac River, Rímac and Lurín Rivers, in the desert zone of t ...
. In Brazil, Omaguas live in several villages on the middle and upper Solimões in Amazonas, in lands predominately occupied by the
Ticunas The Ticuna (also Magüta, Tucuna, Tikuna, or Tukuna) are an indigenous people of Brazil (36,000'')'', Colombia (6,000), and Peru (7,000). They are the most numerous tribe in the Brazilian Amazon. History The Ticuna were originally a tribe th ...
, with smaller groups in
Manaus Manaus () is the capital and largest city of the Brazilian state of Amazonas. It is the seventh-largest city in Brazil, with an estimated 2020 population of 2,219,580 distributed over a land area of about . Located at the east center of the s ...
. The Brazilian population is estimated to be around 1,500 people, but an official 2002 census identified only 325 individuals, possibly due to poor census techniques and because those Cambebas living on the Ticuna reservation were counted as Ticunas.


Linguistic controversy

Some linguists argue that the
Omagua language Omagua is a Tupí-Guarani language closely related to Cocama, belonging to the Group III subgroup of the Tupí-Guaraní family, according to Aryon Rodrigues' classification of the family. Alternate names for Omagua include: Agua, Anapia, Arian ...
is derived from Tupi-Guarani and became a distinct language in relatively recent times, however there is evidence that Omagua and the closely related
Kokama language Cocama (Kokáma) is a language spoken by thousands of people in western South America. It is spoken along the banks of the Northeastern lower Ucayali, lower Marañón, and Huallaga rivers and in neighboring areas of Brazil and an isolated ...
already existed in a form similar to their modern forms by the time European missionaries arrived in Maynas in the 17th century.Michael, Lev . 2014. "On the Pre-Columbian Origin of Proto-Omagua-Kokama." ''Journal of Language Contact'' 7(2):309{344.
/ref> The use of the language has declined due to schooling of young people, and Cambeba is spoken fluently only by tribal elders on formal occasions, in meetings and in some school classes.


Early Jesuit missions

Missionary interactions with the Cambebas began with an expedition led by the Jesuits
Simón de Rojas Simón de Rojas (28 October 1552 – 29 September 1624) was a Spanish priest of the Trinitarian Order known as the "Apostle of the Ave Maria", for his devotion to the Blessed Virgin Mary. A person of many abilities, Rojas was a theologian and a ...
and Umberto Coronado to the Upper
Napo River The Napo River ( es, Río Napo) is a tributary to the Amazon River that rises in Ecuador on the flanks of the east Andean volcanoes of Antisana, Sincholagua and Cotopaxi. The total length is . The river drains an area of . The mean annual discha ...
in 1620. The expedition spent almost a year with the Cambebas of the
Aguarico River The Aguarico River ( es, Río Aguarico, meaning "rich water") is a river in northeastern Ecuador. It is the main river of the Sucumbíos province. In the last part of its course it is the Ecuadorian-Peruvian border. It empties into the Napo Riv ...
area, and by virtue of a bilingual Quechua-Cambeba translator, produced a number of ecclesiastical texts in Omagua, including a
catechism A catechism (; from grc, κατηχέω, "to teach orally") is a summary or exposition of doctrine and serves as a learning introduction to the Sacraments traditionally used in catechesis, or Christian religious teaching of children and adult c ...
. In 1687, Samuel Fritz (1654-1725) arrived to begin work converting the Cambeba to Christianity and within a few years had developed his own Cambeba catechism.Lev Michael and Zachary O’Hagan, "A Linguistic Analysis of Old Omagua Ecclesiastical Texts," University of California, Berkeley.
/ref> When Fritz arrived in their territory, the Cambeba inhabited the islands in the middle of the
Amazon River The Amazon River (, ; es, Río Amazonas, pt, Rio Amazonas) in South America is the largest river by discharge volume of water in the world, and the disputed longest river system in the world in comparison to the Nile. The headwaters of t ...
, in a region stretching approximately from the confluence of the Amazon and
Napo River The Napo River ( es, Río Napo) is a tributary to the Amazon River that rises in Ecuador on the flanks of the east Andean volcanoes of Antisana, Sincholagua and Cotopaxi. The total length is . The river drains an area of . The mean annual discha ...
to the Juruá River. Towards the end of his first year among the Omaguas, he began a lengthy journey downriver to visit all thirty-eight existing villages, spending two months at each one. He renamed them using the names of patron saints, constructed several rudimentary chapels and baptized mainly children because he found most adults to be insufficiently indoctrinated, as well as "reluctant to give up entirely certain heathen abuses." At the conclusion of this journey, which lasted about three years, he conducted a baptismal ceremony over the entire tribe before returning to San Joaquín de Omaguas. He later concentrated indigenous peoples from forty different localities into so-called " Jesuit reductions."Works Issued by the Hakluyt Society, Issue 24, 1859; University of Minnesota.
/ref>


Cultural observations of Samuel Fritz

Much of what is known about the Cambeba people was written by Samuel Fritz during the 38 years that he lived in the Amazon. Fritz described Omagua men as unusually "talkative and proud" in comparison with other Amazonian Indians. They were universally acknowledged to be the best canoemen on the river. They wore beautiful multi-colored cotton clothing including " breeches and shirts of cotton," while women wore "two pieces of the same kind, one of which serves them for a small apron, the other to form an indifferent covering for the breasts." Both men and women painted great portions of their bodies, faces and even their hair with the "juice, darker than
mulberry ''Morus'', a genus of flowering plants in the family Moraceae, consists of diverse species of deciduous trees commonly known as mulberries, growing wild and under cultivation in many temperate world regions. Generally, the genus has 64 identif ...
, of a forest fruit called jagua." The Omaguas told Fritz with remarkable candor that before becoming Christians, they had enjoyed a kind of
polity A polity is an identifiable Politics, political entity – a group of people with a collective identity, who are organized by some form of Institutionalisation, institutionalized social relation, social relations, and have a capacity to mobilize ...
and government; many of them living a sociable life, showing a satisfactory subjection and obedience to their principal
cacique A ''cacique'' (Latin American ; ; feminine form: ''cacica'') was a tribal chieftain of the Taíno people, the indigenous inhabitants at European contact of the Bahamas, the Greater Antilles, and the northern Lesser Antilles. The term is a Spa ...
s, and treating everyone, men and women alike, with a certain consideration. According to Fritz, when Omagua girls reached puberty, they would be hung up in hammocks "within an awning fixed to the top of the house," and kept there for a month with nothing but a little water and dry farinha for their sustenance and some cotton to keep themselves busy by spinning. At the end of that ordeal, they were taken down and carried to the river, washed from head to foot, painted from the face down to the middle of the body, and then sent home naked to be adorned with feathers and celebrated in their new womanhood by the entire community with music and dancing. During these ceremonies, the other women would give them small quantities of manioc beer to drink; finally, the oldest man in the village would come up and strike them on the shoulders with a small stick, giving them at the same time the names they would bear for the rest of their lives. After undergoing this ritual, the men were allowed to ask for them as wives. The Omaguas harvested their crops from the island
mud-flats Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal fl ...
as well as from their
swidden Slash-and-burn agriculture is a farming method that involves the cutting and burning of plants in a forest or woodland to create a field called a swidden. The method begins by cutting down the trees and woody plants in an area. The downed vegeta ...
s; and they stored manioc underground in ingeniously designed pits, to be protected from the flood and then eaten during the next planting season. They hung up maize and other fruits of the soil in the high parts of their houses for preservation. When the floods came, they were ready for it on elevated bark floors in their tall houses, and used their canoes for all movement from one place to another. They fought and hunted only with the lance, blowgun and ''boquetera'', a sling discharging hard clay bullets used to kill the manatee, the river turtle and the enormous
pirarucú The arapaima, pirarucu, or paiche is any large species of bonytongue in the genus ''Arapaima'' native to the Amazon and Essequibo basins of South America. ''Arapaima'' is the type genus of the subfamily Arapaiminae within the family Osteoglossi ...
fish.


The Cambeba rebellion of 1701

By the 1690s, Portuguese slave raids launched intermittently from Pará (modern-day Belém) became so intense and frequent that the Cambeba from distant communities, as well as neighboring Yurimagua, fled to the comparative safety of the Spanish Jesuit mission settlements near the mouth of the Napo River, including San Joaquin de Omaguas. This influx of refugees contributed to a deterioration of the relationship between the Jesuits and the longer-term Cambeba residents of the mission settlements.Frank Salomon, Stuart B. Schwartz, eds.''Indians of South America, Part 1'' Volume 3 of Cambridge history of the native peoples of the Americas, Cambridge University Press, 1999.
In 1701, Cambebas in several settlements rose up against the Jesuit missionary presence, under the leadership of the Cambeba
cacique A ''cacique'' (Latin American ; ; feminine form: ''cacica'') was a tribal chieftain of the Taíno people, the indigenous inhabitants at European contact of the Bahamas, the Greater Antilles, and the northern Lesser Antilles. The term is a Spa ...
Payoreva. At Fritz's request, a small military force quelled the revolt, and Fritz subsequently instituted annual visits by secular military forces to intimidate the Cambeba and stave off potential uprisings. Payoreva was arrested and imprisoned by the Spanish, however he escaped and returned to San Joaquin de Omaguas to persuade the Omagua people to leave the influence of the missionaries and establish new settlements along the Juruá River. Fritz attempted to persuade the Cambebas to return to the mission and even promised a pardon for Chief Payoreva. Many of those who followed Payoreva were eventually enslaved by the Portuguese, as was Payoreva himself in 1704. That same year Fritz was appointed Jesuit Superior and responsibility for the Omagua missions was handed over to the Sardinian Juan Baptista Sanna, who had begun working among the Omagua in 1701.


Destruction of indigenous communities

In February 1709, the new king of Portugal,
João V Dom John V ( pt, João Francisco António José Bento Bernardo; 22 October 1689 – 31 July 1750), known as the Magnanimous (''o Magnânimo'') and the Portuguese Sun King (''o Rei-Sol Português''), was King of Portugal from 9 December 17 ...
, sent a large contingent of Portuguese soldiers to raid the Upper Solimões and to demand the withdrawal of all Spanish missionaries from the region. Fritz wrote to the Portuguese commander begging him to desist, but the Portuguese destroyed several Yurimagua and Cambeba communities. Finally, in July, Spanish authorities sent a military force to drive the Portuguese out, burning several Carmelite missions in the process. In 1710 the Portuguese sent more troops into the region, leading Sanna to attempt to relocate the populations of San Joaquin de Omaguas and the neighboring San Pablo to the safer location of Yarapa, on the lower
Ucayali River The Ucayali River ( es, Río Ucayali, ) is the main headstream of the Amazon River. It rises about north of Lake Titicaca, in the Arequipa region of Peru and becomes the Amazon at the confluence of the Marañón close to Nauta city. The city of ...
. However, the Portuguese arrived in the midst of this relocation, killing many Omaguas, and capturing others, as well as taking Sanna prisoner. He was held in Portugal for a short time and eventually sent on a mission to Japan. The fighting dispersed nearly all the communities of the Yurimaguas and the Cambebas, and the survivors were devastated by an epidemic which began in April 1710 and left the formerly populous region of the Upper Solimões uninhabited. Jesuit activity among the Cambeba ceased until July 1723, when Bernard Zurmühlen and Johannes Baptist Julian arrived to found a new mission. Zurmühlen remained with the Cambebas until 1726, and San Joaquin de Omaguas became the principal center for missionary activity in the lowland regions of Maynas until the Portuguese expulsion of the Jesuits in 1767.


The Cabanagem Revolt

Infectious disease, slavery and forced labor took their toll on Cambeba population and culture throughout the 18th century. The Cabanagem Revolt (1835–40), in which slave-hunters were killed and plantations burned, led to a resurgence of ethnic identity among indigenous peoples in Brazil,Mark Harris, ''Rebellion on the Amazon: The Cabanagem, Race, and Popular Culture in the North of Brazil, 1798-1840,'' Volume 95 of Cambridge Latin American Studies; Cambridge University Press, 2010.
however by the 1850s new controls under the Indian Directorate system, plus new forced labor programs set up to further the extraction of rubber, discouraged Cambeba traditions and culture.


See also

* Marajoara culture * Population history of indigenous peoples of the Americas * Samuel Fritz


References

* {{authority control Ethnic groups in Brazil Indigenous peoples in Brazil Indigenous peoples of the Amazon Pre-Columbian indigenous peoples of the Amazon