The Amanayé (Amanayé/Amanaié or Ararandeuara/Araradeua) are a self-denomination Tupi-Guaranian people of Native South American nation of Brazil's Amazon basin. Residents of northeastern Brazil, they live between the cities of Belém and Brasília in the state of Pará, near the municipality of São Domingos do Capim. The name Amanayé supposedly means 'association of people', and appears in sources as Manajo and Amanajo as well. Part of the Amanayé may have taken the name of Ararandeuara, in reference to the igarapé (small Amazon waterway) near which they live. Sedentary farmers, hunters and gatherers, they speak Tupi and live on the Upper Capim River (between two water courses, Ararandeua and Surubiju), in the State of Pará.

Historically, the Amanayé have also been known as the Manaye, Manazewa, Manajo, Manaxo, Ararandeuras, and the Turiwa. They originally came from the Pindaré River area of Maranhão, with possible relations to the Tembé Indians.

It was at the Pindaré River that they resisted integration into villages. The Amanyé were first contacted in 1755 as they tended to avoid white missionaries, however they made a deal with Father David Fay, a Jesuit missionary among the Guajajara of the São Francisco do Carará village. Fay managed to persuade the Amanayé to settle in a village together with the Guajajara, their traditional enemies. Shortly afterwards, part of the group moved to the Alpercatas River, on the border of Maranhão and Piauí, settling near the village of Santo Antônio.

In the early 19th century, their population reached an estimated high of approximately 300 to 400 individuals residing in villages along the Caju River. However, by 1815 just 20 of them remained, mixed with other races, with most disappearing into the Mestizo population in the 20th century, though their contemporary culture provides little disapproval for intermarriage with Mestizos or other Indians. As a result, their population is in rapid decline.

It is believed that in 1873, the Amanayé killed the village missionary, Cândido de Heremence, and a Belgian engineer who happened to be in the area. The retaliations against them led part of the group into hiding near the igarapé Ararandeua, where they avoided contacts with the regional population. According to Nimuendajú, these Amanayé began to identify themselves as Ararandeuara or as Turiwara in order to disguise their identity.

In 1880, the Amanayé allegedly killed a group of Tembé and Turiwara peoples, leading to the president of the Province of Pará to give "weapons and ammunitions so that these tame Indians are able to defend themselves from the attacks by the Amanayé". After this, it is thought that the Amanayé separated themselves completely from the Tembé and the Turiwara, moving to the Capim River.

A group numbering up to 66 remained in 1999, though their numbers increased up to 195 in the year 2001, before decreasing once more to 134 as of 2010, only to increase again by 2014 to 178.

Along with other Tupi tribes, the Amanayé practice slash-and-burn agriculture, and raise cassava, cotton and tobacco.